diff --git a/.gitignore b/.gitignore
index 71fb2bf5d..b4bfff911 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,4 +14,7 @@ bcdaworker/tmpdata/*
 bcda/pending_delete_dir/*
 .vault_password
 shared_files/decrypted/*
-!shared_files/decrypted/README.md
\ No newline at end of file
+!shared_files/decrypted/README.md
+
+# Localstack volume
+.localstack_volume/
diff --git a/bcda/bcdacli/cli.go b/bcda/bcdacli/cli.go
index 0ba7c87fe..ef4d6561b 100644
--- a/bcda/bcdacli/cli.go
+++ b/bcda/bcdacli/cli.go
@@ -68,7 +68,7 @@ func setUpApp() *cli.App {
 		r = postgres.NewRepository(db)
 		return nil
 	}
-	var acoName, acoCMSID, acoID, accessToken, acoSize, filePath, dirToDelete, environment, groupID, groupName, ips, fileType, alrFile string
+	var acoName, acoCMSID, acoID, accessToken, acoSize, filePath, fileSource, s3Endpoint, assumeRoleArn, dirToDelete, environment, groupID, groupName, ips, fileType, alrFile string
 	var thresholdHr int
 	var httpPort, httpsPort int
 	app.Commands = []cli.Command{
@@ -475,17 +475,45 @@ func setUpApp() *cli.App {
 					Usage:       "Directory where suppression files are located",
 					Destination: &filePath,
 				},
+				cli.StringFlag{
+					Name:        "filesource",
+					Usage:       "Source of files. Must be one of 'local', 's3'. Defaults to 'local'",
+					Destination: &fileSource,
+				},
+				cli.StringFlag{
+					Name:        "s3endpoint",
+					Usage:       "Custom S3 endpoint",
+					Destination: &s3Endpoint,
+				},
+				cli.StringFlag{
+					Name:        "assume-role-arn",
+					Usage:       "Optional IAM role ARN to assume for S3",
+					Destination: &assumeRoleArn,
+				},
 			},
 			Action: func(c *cli.Context) error {
 				ignoreSignals()
 				db := database.Connection
 				r := postgres.NewRepository(db)
-				importer := suppression.OptOutImporter{
-					FileHandler: &optout.LocalFileHandler{
+
+				var file_handler optout.OptOutFileHandler
+
+				if fileSource == "s3" {
+					file_handler = &optout.S3FileHandler{
+						Logger:        log.API,
+						Endpoint:      s3Endpoint,
+						AssumeRoleArn: assumeRoleArn,
+					}
+				} else {
+					file_handler = &optout.LocalFileHandler{
 						Logger:                 log.API,
 						PendingDeletionDir:     conf.GetEnv("PENDING_DELETION_DIR"),
 						FileArchiveThresholdHr: uint(utils.GetEnvInt("FILE_ARCHIVE_THRESHOLD_HR", 72)),
-					},
+					}
+				}
+
+				importer := suppression.OptOutImporter{
+					FileHandler: file_handler,
 					Saver: &suppression.BCDASaver{
 						Repo: r,
 					},
diff --git a/bcda/bcdacli/cli_test.go b/bcda/bcdacli/cli_test.go
index d56c316ea..18a8db441 100644
--- a/bcda/bcdacli/cli_test.go
+++ b/bcda/bcdacli/cli_test.go
@@ -776,7 +776,7 @@ func (s *CLITestSuite) TestDeleteDirectoryContents() {
 
 }
 
-func (s *CLITestSuite) TestImportSuppressionDirectory() {
+func (s *CLITestSuite) TestImportSuppressionDirectoryFromLocal() {
 	assert := assert.New(s.T())
 
 	buf := new(bytes.Buffer)
@@ -803,6 +803,33 @@ func (s *CLITestSuite) TestImportSuppressionDirectory() {
 	}
 }
 
+func (s *CLITestSuite) TestImportSuppressionDirectoryFromS3() {
+	assert := assert.New(s.T())
+
+	buf := new(bytes.Buffer)
+	s.testApp.Writer = buf
+
+	path, cleanup := testUtils.CopyToS3(s.T(), "../../shared_files/synthetic1800MedicareFiles/test2/")
+	defer cleanup()
+
+	args := []string{"bcda", constants.ImportSupDir, constants.DirectoryArg, path, constants.FileSourceArg, "s3", constants.S3EndpointArg, conf.GetEnv("BFD_S3_ENDPOINT")}
+	err := s.testApp.Run(args)
+	assert.Nil(err)
+	assert.Contains(buf.String(), constants.CompleteMedSupDataImp)
+	assert.Contains(buf.String(), "Files imported: 2")
+	assert.Contains(buf.String(), "Files failed: 0")
+	assert.Contains(buf.String(), "Files skipped: 0")
+
+	fs := postgrestest.GetSuppressionFileByName(s.T(), s.db,
+		"T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000010",
+		"T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241391")
+
+	assert.Len(fs, 2)
+	for _, f := range fs {
+		postgrestest.DeleteSuppressionFileByID(s.T(), s.db, f.ID)
+	}
+}
+
 func (s *CLITestSuite) TestImportSuppressionDirectory_Skipped() {
 	assert := assert.New(s.T())
 
diff --git a/bcda/constants/test_constants.go b/bcda/constants/test_constants.go
index 60d3e24b3..881158ba7 100644
--- a/bcda/constants/test_constants.go
+++ b/bcda/constants/test_constants.go
@@ -64,6 +64,8 @@ const ArchJobFiles = "archive-job-files"
 const DelDirContents = "delete-dir-contents"
 const ImportSupDir = "import-suppression-directory"
 const DirectoryArg = "--directory"
+const FileSourceArg = "--filesource"
+const S3EndpointArg = "--s3endpoint"
 const TestExcludeSAMHSA = "excludeSAMHSA=true"
 const TestSvcDate = "service-date"
 const FakeClientID = "fake-client-id"
diff --git a/bcda/suppression/suppression_s3_test.go b/bcda/suppression/suppression_s3_test.go
new file mode 100644
index 000000000..9fcba0386
--- /dev/null
+++ b/bcda/suppression/suppression_s3_test.go
@@ -0,0 +1,349 @@
+package suppression
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	log "github.com/sirupsen/logrus"
+
+	"github.com/CMSgov/bcda-app/bcda/constants"
+	"github.com/CMSgov/bcda-app/bcda/database"
+	"github.com/CMSgov/bcda-app/bcda/models/postgres"
+	"github.com/CMSgov/bcda-app/bcda/models/postgres/postgrestest"
+	"github.com/CMSgov/bcda-app/bcda/testUtils"
+	"github.com/CMSgov/bcda-app/bcda/utils"
+	"github.com/CMSgov/bcda-app/conf"
+	"github.com/CMSgov/bcda-app/optout"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/suite"
+)
+
+type SuppressionS3TestSuite struct {
+	suite.Suite
+}
+
+func (s *SuppressionS3TestSuite) createImporter() (OptOutImporter, *optout.FakeSaver) {
+	saver := optout.FakeSaver{}
+	return OptOutImporter{
+		FileHandler: &optout.S3FileHandler{
+			Logger:   log.StandardLogger(),
+			Endpoint: conf.GetEnv("BFD_S3_ENDPOINT"),
+		},
+		Saver:                &saver,
+		Logger:               log.StandardLogger(),
+		ImportStatusInterval: utils.GetEnvInt("SUPPRESS_IMPORT_STATUS_RECORDS_INTERVAL", 1000),
+	}, &saver
+}
+
+func TestSuppressionS3TestSuite(t *testing.T) {
+	suite.Run(t, new(SuppressionS3TestSuite))
+}
+
+func (s *SuppressionS3TestSuite) TestImportSuppression() {
+	assert := assert.New(s.T())
+	bucketName, cleanup := testUtils.CopyToS3(s.T(), "../../shared_files/synthetic1800MedicareFiles/test/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	defer cleanup()
+
+	// 181120 file
+	fileTime, _ := time.Parse(time.RFC3339, "2018-11-20T10:00:00Z")
+	metadata := &optout.OptOutFilenameMetadata{
+		Timestamp:    fileTime,
+		FilePath:     filepath.Join(bucketName, "synthetic1800MedicareFiles/test/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009"),
+		Name:         constants.TestSuppressMetaFileName,
+		DeliveryDate: time.Now(),
+	}
+
+	importer, saver := s.createImporter()
+	err := importer.ImportSuppressionData(metadata)
+	assert.Nil(err)
+	assert.Len(saver.Files, 1)
+
+	suppressionFile := saver.Files[0]
+	assert.Equal(constants.TestSuppressMetaFileName, suppressionFile.Name)
+	assert.Equal(fileTime.Format("010203040506"), suppressionFile.Timestamp.UTC().Format("010203040506"))
+	assert.Equal(constants.ImportComplete, suppressionFile.ImportStatus)
+
+	suppressions := saver.OptOutRecords
+	assert.Len(suppressions, 4)
+	assert.Equal("5SJ0A00AA00", suppressions[0].MBI)
+	assert.Equal("1-800", suppressions[0].SourceCode)
+	assert.Equal("4SF6G00AA00", suppressions[1].MBI)
+	assert.Equal("1-800", suppressions[1].SourceCode)
+	assert.Equal("4SH0A00AA00", suppressions[2].MBI)
+	assert.Equal("", suppressions[2].SourceCode)
+	assert.Equal("8SG0A00AA00", suppressions[3].MBI)
+	assert.Equal("1-800", suppressions[3].SourceCode)
+
+	// 190816 file T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241390
+	bucketName, cleanup = testUtils.CopyToS3(s.T(), "../../shared_files/synthetic1800MedicareFiles/test/T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241390")
+	defer cleanup()
+
+	fileTime, _ = time.Parse(time.RFC3339, "2019-08-16T02:41:39Z")
+	metadata = &optout.OptOutFilenameMetadata{
+		Timestamp:    fileTime,
+		FilePath:     filepath.Join(bucketName, "synthetic1800MedicareFiles/test/T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241390"),
+		Name:         "T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241390",
+		DeliveryDate: time.Now(),
+	}
+
+	importer, saver = s.createImporter()
+	err = importer.ImportSuppressionData(metadata)
+	assert.Nil(err)
+	assert.Len(saver.Files, 1)
+
+	suppressionFile = saver.Files[0]
+	assert.Equal("T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241390", suppressionFile.Name)
+	assert.Equal(fileTime.Format("010203040506"), suppressionFile.Timestamp.UTC().Format("010203040506"))
+
+	suppressions = saver.OptOutRecords
+	assert.Len(suppressions, 250)
+	assert.Equal("1000000019", suppressions[0].MBI)
+	assert.Equal("N", suppressions[0].PrefIndicator)
+	assert.Equal("1000039915", suppressions[20].MBI)
+	assert.Equal("N", suppressions[20].PrefIndicator)
+	assert.Equal("1000099805", suppressions[100].MBI)
+	assert.Equal("N", suppressions[100].PrefIndicator)
+	assert.Equal("1000026399", suppressions[200].MBI)
+	assert.Equal("N", suppressions[200].PrefIndicator)
+	assert.Equal("1000098787", suppressions[249].MBI)
+	assert.Equal("", suppressions[249].PrefIndicator)
+}
+
+func (s *SuppressionS3TestSuite) TestImportSuppression_MissingData() {
+	assert := assert.New(s.T())
+
+	// Verify empty file is rejected
+	metadata := &optout.OptOutFilenameMetadata{}
+	importer, _ := s.createImporter()
+	err := importer.ImportSuppressionData(metadata)
+	assert.NotNil(err)
+	assert.Contains(err.Error(), "could not read file")
+
+	tests := []struct {
+		name    string
+		expErr  string
+		dbError bool
+	}{
+		{"T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000011", "failed to parse the effective date '20191301' from file", false},
+		{"T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000012", "failed to parse the samhsa effective date '20191301' from file", false},
+		{"T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000013", "failed to parse beneficiary link key from file", false},
+		{"T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000011", "could not create suppression file record for file", true},
+	}
+
+	for _, tt := range tests {
+		s.T().Run(tt.name, func(t *testing.T) {
+			bucketName, cleanup := testUtils.CopyToS3(s.T(), fmt.Sprintf("../../shared_files/suppressionfile_MissingData/%s", tt.name))
+			defer cleanup()
+
+			fp := filepath.Join(bucketName, "suppressionfile_MissingData/"+tt.name)
+			metadata = &optout.OptOutFilenameMetadata{
+				Timestamp:    time.Now(),
+				FilePath:     fp,
+				Name:         tt.name,
+				DeliveryDate: time.Now(),
+			}
+
+			importer, saver := s.createImporter()
+
+			if tt.dbError {
+				db, _, err := sqlmock.New()
+				assert.NoError(err)
+				db.Close()
+
+				importer.Saver = &BCDASaver{
+					Repo: postgres.NewRepository(db),
+				}
+			}
+
+			err = importer.ImportSuppressionData(metadata)
+			assert.NotNil(err)
+			assert.Contains(err.Error(), fmt.Sprintf("%s: %s", tt.expErr, fp))
+
+			if !tt.dbError {
+				suppressionFile := saver.Files[0]
+				assert.Equal(constants.ImportFail, suppressionFile.ImportStatus)
+			}
+		})
+	}
+}
+
+func (s *SuppressionS3TestSuite) TestValidate() {
+	assert := assert.New(s.T())
+	importer, _ := s.createImporter()
+
+	// positive
+	bucketName, cleanup := testUtils.CopyToS3(s.T(), "../../shared_files/synthetic1800MedicareFiles/test/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	defer cleanup()
+
+	suppressionfilePath := filepath.Join(bucketName, "synthetic1800MedicareFiles/test/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	metadata := &optout.OptOutFilenameMetadata{Timestamp: time.Now(), FilePath: suppressionfilePath}
+	err := importer.validate(metadata)
+	assert.Nil(err)
+
+	// bad file path
+	metadata.FilePath = metadata.FilePath + "/blah/"
+	err = importer.validate(metadata)
+	assert.NotNil(err)
+	assert.Contains(err.Error(), "could not read file "+metadata.FilePath)
+
+	// invalid file header
+	bucketName, cleanup = testUtils.CopyToS3(s.T(), "../../shared_files/suppressionfile_BadHeader/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	defer cleanup()
+
+	metadata.FilePath = filepath.Join(bucketName, "suppressionfile_BadHeader/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	err = importer.validate(metadata)
+	assert.EqualError(err, "invalid file header for file: "+metadata.FilePath)
+
+	// missing record count
+	bucketName, cleanup = testUtils.CopyToS3(s.T(), "../../shared_files/suppressionfile_MissingData/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	defer cleanup()
+
+	metadata.FilePath = filepath.Join(bucketName, "suppressionfile_MissingData/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009")
+	err = importer.validate(metadata)
+	assert.EqualError(err, "failed to parse record count from file: "+metadata.FilePath)
+
+	// incorrect record count
+	bucketName, cleanup = testUtils.CopyToS3(s.T(), "../../shared_files/suppressionfile_MissingData/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000010")
+	defer cleanup()
+
+	metadata.FilePath = filepath.Join(bucketName, "suppressionfile_MissingData/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000010")
+	err = importer.validate(metadata)
+	assert.EqualError(err, "incorrect number of records found from file: '"+metadata.FilePath+"'. Expected record count: 5, Actual record count: 4")
+}
+
+func (s *SuppressionS3TestSuite) TestLoadOptOutFiles() {
+	assert := assert.New(s.T())
+	importer, _ := s.createImporter()
+
+	bucketName, cleanup := testUtils.CopyToS3(s.T(), fmt.Sprintf("../../shared_files/%s", constants.TestSynthMedFilesPath))
+	defer cleanup()
+
+	filePath := filepath.Join(bucketName, constants.TestSynthMedFilesPath)
+	suppresslist, skipped, err := importer.FileHandler.LoadOptOutFiles(filePath)
+	assert.Nil(err)
+	assert.Equal(2, len(*suppresslist))
+	assert.Equal(0, skipped)
+
+	bucketName, cleanup = testUtils.CopyToS3(s.T(), "../../shared_files/suppressionfile_BadFileNames/")
+	defer cleanup()
+
+	filePath = filepath.Join(bucketName, "suppressionfile_BadFileNames/")
+	suppresslist, skipped, err = importer.FileHandler.LoadOptOutFiles(filePath)
+	assert.Nil(err)
+	assert.Equal(0, len(*suppresslist))
+	assert.Equal(2, skipped)
+}
+
+func (s *SuppressionS3TestSuite) TestCleanupSuppression() {
+	assert := assert.New(s.T())
+	importer, _ := s.createImporter()
+
+	var suppresslist []*optout.OptOutFilenameMetadata
+
+	// failed import: file that's within the threshold - stay put
+	fileTime, _ := time.Parse(time.RFC3339, "2018-11-20T10:00:09Z")
+
+	bucketName := "doesnt-matter"
+
+	metadata := &optout.OptOutFilenameMetadata{
+		Name:         constants.TestSuppressMetaFileName,
+		Timestamp:    fileTime,
+		FilePath:     filepath.Join(bucketName, "suppressionfile_BadHeader/T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000009"),
+		Imported:     false,
+		DeliveryDate: time.Now(),
+	}
+
+	// failed import: file that's over the threshold - should still be kept until S3 auto-cleanup
+	fileTime, _ = time.Parse(time.RFC3339, "2018-11-20T10:00:00Z")
+
+	metadata2 := &optout.OptOutFilenameMetadata{
+		Name:         constants.TestSuppressBadPath,
+		Timestamp:    fileTime,
+		FilePath:     filepath.Join(bucketName, "suppressionfile_BadFileNames/T#EFT.ON.ACO.NGD1800.FRPD.D191220.T1000009"),
+		Imported:     false,
+		DeliveryDate: fileTime,
+	}
+
+	bucketName, cleanup := testUtils.CopyToS3(s.T(), "../../shared_files/suppressionfile_BadFileNames/T#EFT.ON.ACO.NGD1800.DPRF.D190117.T9909420")
+	defer cleanup()
+
+	// successful import: should move
+	metadata3 := &optout.OptOutFilenameMetadata{
+		Name:         "T#EFT.ON.ACO.NGD1800.DPRF.D190117.T9909420",
+		Timestamp:    fileTime,
+		FilePath:     filepath.Join(bucketName, "suppressionfile_BadFileNames/T#EFT.ON.ACO.NGD1800.DPRF.D190117.T9909420"),
+		Imported:     true,
+		DeliveryDate: time.Now(),
+	}
+
+	suppresslist = []*optout.OptOutFilenameMetadata{metadata, metadata2, metadata3}
+	err := importer.FileHandler.CleanupOptOutFiles(suppresslist)
+	assert.Nil(err)
+
+	objects := testUtils.ListS3Objects(s.T(), bucketName, "")
+	assert.True(len(objects) == 0)
+}
+
+func (s *SuppressionS3TestSuite) TestImportSuppressionDirectoryTable() {
+	assert := assert.New(s.T())
+	importer, _ := s.createImporter()
+	db := database.Connection
+
+	importer.Saver = &BCDASaver{
+		Repo: postgres.NewRepository(db),
+	}
+
+	tests := []struct {
+		name           string
+		directory      string
+		success        int
+		failure        int
+		skipped        int
+		errorExpected  bool
+		errMessage     string
+		deleteFiles    bool
+		insertCarriage bool
+	}{
+		{name: "Valid test", directory: "../../shared_files/synthetic1800MedicareFiles/test2/", success: 2, failure: 0, skipped: 0, errorExpected: false, errMessage: "", deleteFiles: true},
+		{name: "Import failure", directory: "../../shared_files/suppressionfile_BadHeader/", success: 0, failure: 1, skipped: 0, errorExpected: true, errMessage: "one or more suppression files failed to import correctly", deleteFiles: false},
+		{name: "Skipped import", directory: "../../shared_files/suppressionfile_BadFileNames/", success: 0, failure: 0, skipped: 2, errorExpected: false, errMessage: "", deleteFiles: false},
+		{name: "Carriage char in path", directory: "../../shared_files/suppressionfile_BadFileNames/", success: 0, failure: 0, skipped: 0, errorExpected: true, errMessage: "The specified bucket does not exist", deleteFiles: false, insertCarriage: true},
+	}
+
+	for _, tt := range tests {
+		s.T().Run(tt.name, func(t *testing.T) {
+			bucketName, cleanup := testUtils.CopyToS3(s.T(), tt.directory)
+			defer cleanup()
+
+			if tt.insertCarriage {
+				bucketName += "\n"
+			}
+
+			success, failure, skipped, err := importer.ImportSuppressionDirectory(bucketName)
+			if tt.errorExpected {
+				assert.Equal(true, strings.Contains(err.Error(), tt.errMessage))
+			} else {
+				assert.Nil(err)
+			}
+			assert.Equal(tt.success, success)
+			assert.Equal(tt.failure, failure)
+			assert.Equal(tt.skipped, skipped)
+
+			if tt.deleteFiles {
+				fs := postgrestest.GetSuppressionFileByName(s.T(), db,
+					"T#EFT.ON.ACO.NGD1800.DPRF.D181120.T1000010",
+					"T#EFT.ON.ACO.NGD1800.DPRF.D190816.T0241391")
+				assert.Len(fs, 2)
+				for _, f := range fs {
+					postgrestest.DeleteSuppressionFileByID(s.T(), db, f.ID)
+				}
+			}
+
+		})
+	}
+}
diff --git a/bcda/suppression/suppression_test.go b/bcda/suppression/suppression_test.go
index a427c9ffa..b12589850 100644
--- a/bcda/suppression/suppression_test.go
+++ b/bcda/suppression/suppression_test.go
@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/DATA-DOG/go-sqlmock"
 	log "github.com/sirupsen/logrus"
 
 	"github.com/CMSgov/bcda-app/bcda/constants"
@@ -167,13 +168,15 @@ func (s *SuppressionTestSuite) TestImportSuppression_MissingData() {
 			}
 
 			importer, saver := s.createImporter()
-			db := database.Connection
 
 			if tt.dbError {
+				db, _, err := sqlmock.New()
+				assert.NoError(err)
+				db.Close()
+
 				importer.Saver = &BCDASaver{
 					Repo: postgres.NewRepository(db),
 				}
-				db.Close()
 			}
 
 			err = importer.ImportSuppressionData(metadata)
diff --git a/bcda/testUtils/utils.go b/bcda/testUtils/utils.go
index 11bc26207..a4f897c91 100644
--- a/bcda/testUtils/utils.go
+++ b/bcda/testUtils/utils.go
@@ -14,12 +14,18 @@ import (
 	"os"
 	"path/filepath"
 	"strconv"
+	"strings"
 	"testing"
 	"time"
 
 	"github.com/CMSgov/bcda-app/bcda/constants"
 	"github.com/CMSgov/bcda-app/conf"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/aws/aws-sdk-go/service/s3/s3manager"
 	"github.com/go-chi/chi/v5"
+	"github.com/google/uuid"
 	"github.com/sirupsen/logrus"
 
 	"github.com/otiai10/copy"
@@ -133,6 +139,121 @@ func CopyToTemporaryDirectory(t *testing.T, src string) (string, func()) {
 	return newPath, cleanup
 }
 
+// CopyToS3 copies all of the content found at src into a temporary S3 folder within localstack.
+// The path to the temporary S3 directory is returned along with a function that can be called to clean up the data.
+func CopyToS3(t *testing.T, src string) (string, func()) {
+	tempBucket, err := uuid.NewUUID()
+
+	if err != nil {
+		t.Fatalf("Failed to generate temporary path name: %s", err.Error())
+	}
+
+	endpoint := conf.GetEnv("BFD_S3_ENDPOINT")
+
+	config := aws.Config{
+		Region:           aws.String("us-east-1"),
+		S3ForcePathStyle: aws.Bool(true),
+		Endpoint:         &endpoint,
+	}
+
+	sess, err := session.NewSessionWithOptions(session.Options{
+		Config: config,
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to create new session for S3: %s", err.Error())
+	}
+
+	svc := s3.New(sess)
+
+	_, err = svc.CreateBucket(&s3.CreateBucketInput{
+		Bucket: aws.String(tempBucket.String()),
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to create bucket %s: %s", tempBucket.String(), err.Error())
+	}
+
+	uploader := s3manager.NewUploader(sess)
+
+	err = filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			t.Fatalf("Unexpected error reading path")
+		}
+
+		if info.IsDir() {
+			return nil
+		}
+
+		f, err := os.Open(filepath.Clean(path))
+		if err != nil {
+			return err
+		}
+
+		key := strings.TrimPrefix(path, "../../shared_files/")
+
+		_, err = uploader.Upload(&s3manager.UploadInput{
+			Bucket: aws.String(tempBucket.String()),
+			Key:    aws.String(key),
+			Body:   f,
+		})
+
+		fmt.Printf("Uploaded file in bucket %s, key %s\n", tempBucket.String(), info.Name())
+		return err
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to upload files to S3: %s", err.Error())
+	}
+
+	cleanup := func() {
+		svc := s3.New(sess)
+		iter := s3manager.NewDeleteListIterator(svc, &s3.ListObjectsInput{
+			Bucket: aws.String(tempBucket.String()),
+		})
+
+		// Traverse iterator deleting each object
+		if err := s3manager.NewBatchDeleteWithClient(svc).Delete(aws.BackgroundContext(), iter); err != nil {
+			log.Printf("Unable to delete objects from bucket %s, %s\n", tempBucket, err)
+		}
+	}
+
+	return tempBucket.String(), cleanup
+}
+
+func ListS3Objects(t *testing.T, bucket string, prefix string) []*s3.Object {
+	endpoint := conf.GetEnv("BFD_S3_ENDPOINT")
+
+	config := aws.Config{
+		Region:           aws.String("us-east-1"),
+		S3ForcePathStyle: aws.Bool(true),
+		Endpoint:         &endpoint,
+	}
+
+	sess, err := session.NewSessionWithOptions(session.Options{
+		Config: config,
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to create new session for S3: %s", err.Error())
+	}
+
+	svc := s3.New(sess)
+
+	fmt.Printf("Listing objects in bucket %s, prefix %s", bucket, prefix)
+
+	resp, err := svc.ListObjects(&s3.ListObjectsInput{
+		Bucket: aws.String(bucket),
+		Prefix: aws.String(prefix),
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to list objects in S3 bucket %s, prefix %s: %s", bucket, prefix, err)
+	}
+
+	return resp.Contents
+}
+
 // GetRandomIPV4Address returns a random IPV4 address using rand.Read() to generate the values.
 func GetRandomIPV4Address(t *testing.T) string {
 	data := make([]byte, 3)
@@ -180,12 +301,12 @@ func MakeTestServerWithIntrospectEndpoint(activeToken bool) *httptest.Server {
 		)
 		buf, err := ioutil.ReadAll(r.Body)
 		if err != nil {
-			fmt.Printf("Unexpected error creating test server: Error in reading request body: %s", err.Error())
+			fmt.Printf("Unexpected error creating test server: Error in reading request body: %s\n", err.Error())
 			return
 		}
 
 		if unmarshalErr := json.Unmarshal(buf, &input); unmarshalErr != nil {
-			fmt.Printf("Unexpected error creating test server: Error in unmarshalling the buffered input to JSON: %s", unmarshalErr.Error())
+			fmt.Printf("Unexpected error creating test server: Error in unmarshalling the buffered input to JSON: %s\n", unmarshalErr.Error())
 			return
 		}
 
@@ -195,7 +316,7 @@ func MakeTestServerWithIntrospectEndpoint(activeToken bool) *httptest.Server {
 
 		_, responseWriterErr := w.Write(body)
 		if responseWriterErr != nil {
-			fmt.Printf("Unexpected error creating test server: Error reading request body: %s", responseWriterErr.Error())
+			fmt.Printf("Unexpected error creating test server: Error reading request body: %s\n", responseWriterErr.Error())
 		}
 
 	})
diff --git a/docker-compose.test.yml b/docker-compose.test.yml
index 88494fadc..6dba1b2bc 100644
--- a/docker-compose.test.yml
+++ b/docker-compose.test.yml
@@ -6,9 +6,17 @@ services:
     build:
       context: .
       dockerfile: Dockerfiles/Dockerfile.tests
+    depends_on:
+      localstack:
+        condition: service_healthy
     env_file:
       - ./shared_files/decrypted/local.env
     environment:
+      # Set default values for Localstack to work
+      - AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID:-foobar}
+      - AWS_SECRET_ACCESS_KEY=${AWS_SECRET_ACCESS_KEY:-foobar}
+      - BFD_S3_ENDPOINT=${BFD_S3_ENDPOINT:-http://localstack:4566}
+
       - DATABASE_URL=postgresql://postgres:toor@db-unit-test:5432/bcda_test?sslmode=disable
       - QUEUE_DATABASE_URL=postgresql://postgres:toor@db-unit-test:5432/bcda_test?sslmode=disable
       - GOLANGCI_LINT_CACHE=/root/.cache/go-build
@@ -27,7 +35,26 @@ services:
     volumes:
       - ./db/testing/docker-entrypoint-initdb.d/:/docker-entrypoint-initdb.d/
     # Pass a flag so we'll log all queries executed on the test db.
-    command: ["postgres", "-c", "log_statement=all"]
+    command: [ "postgres", "-c", "log_statement=all" ]
+  # Spin up a local S3 server for CCLF and Opt Out File import testing
+  localstack:
+    image: localstack/localstack:latest
+    environment:
+      - AWS_DEFAULT_REGION=us-east-1
+      - GATEWAY_LISTEN=0.0.0.0:4566
+      - SERVICES=s3
+      - DEBUG=1
+    ports:
+      - '4566-4583:4566-4583'
+    volumes:
+      - "./.localstack_volume:/var/lib/localstack"
+      - '/var/run/docker.sock:/var/run/docker.sock'
+    healthcheck:
+      test: "curl --silent --fail localstack:4566/_localstack/health | grep '\"s3\": \"available\"'"
+      interval: 10s
+      retries: 12
+      start_period: 30s
+      timeout: 10s
   postman_test:
     build:
       context: .
diff --git a/docker-compose.yml b/docker-compose.yml
index a017cce57..e7d4d6b58 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -25,7 +25,7 @@ services:
       args:
         ENVIRONMENT: development
     entrypoint: ""
-    command: ["../scripts/watch.sh", "api", "bcda", "start-api"]
+    command: [ "../scripts/watch.sh", "api", "bcda", "start-api" ]
     env_file:
       - ./shared_files/decrypted/local.env
     environment:
@@ -48,7 +48,7 @@ services:
       args:
         ENVIRONMENT: development
     entrypoint: ""
-    command: ["../scripts/watch.sh", "worker", "bcdaworker"]
+    command: [ "../scripts/watch.sh", "worker", "bcdaworker" ]
     env_file:
       - ./shared_files/decrypted/local.env
     environment:
diff --git a/go.mod b/go.mod
index cd04cbaa1..12db73bde 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/BurntSushi/toml v0.4.1
 	github.com/DATA-DOG/go-sqlmock v1.5.0
 	github.com/Pallinder/go-randomdata v1.2.0
-	github.com/aws/aws-sdk-go v1.44.47
+	github.com/aws/aws-sdk-go v1.48.9
 	github.com/bgentry/que-go v1.0.1
 	github.com/cenkalti/backoff/v4 v4.1.3
 	github.com/dgrijalva/jwt-go v3.2.1-0.20180309185540-3c771ce311b7+incompatible
@@ -38,8 +38,8 @@ require (
 	github.com/tsenart/vegeta v12.7.0+incompatible
 	github.com/urfave/cli v1.22.9
 	github.com/xo/usql v0.8.2
-	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d
-	golang.org/x/text v0.3.7
+	golang.org/x/crypto v0.14.0
+	golang.org/x/text v0.13.0
 	gotest.tools/gotestsum v1.6.2
 )
 
@@ -198,13 +198,13 @@ require (
 	go.uber.org/atomic v1.9.0 // indirect
 	go.uber.org/multierr v1.6.0 // indirect
 	go.uber.org/zap v1.17.0 // indirect
-	golang.org/x/mod v0.5.1 // indirect
+	golang.org/x/mod v0.8.0 // indirect
 	golang.org/x/net v0.17.0 // indirect
 	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f // indirect
-	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
-	golang.org/x/sys v0.0.0-20220823224334-20c2bfdbfe24 // indirect
-	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
-	golang.org/x/tools v0.1.9 // indirect
+	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/term v0.13.0 // indirect
+	golang.org/x/tools v0.6.0 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	gonum.org/v1/gonum v0.11.0 // indirect
 	google.golang.org/api v0.56.0 // indirect
diff --git a/go.sum b/go.sum
index f43e77b83..6a6b801be 100644
--- a/go.sum
+++ b/go.sum
@@ -201,6 +201,8 @@ github.com/aws/aws-sdk-go v1.34.28/go.mod h1:H7NKnBqNVzoTJpGfLrQkkD+ytBA93eiDYi/
 github.com/aws/aws-sdk-go v1.37.25/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/aws/aws-sdk-go v1.44.47 h1:uyiNvoR4wfZ8Bp4ghgbyzGFIg5knjZMUAd5S9ba9qNU=
 github.com/aws/aws-sdk-go v1.44.47/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
+github.com/aws/aws-sdk-go v1.48.9 h1:vqzjg5FCi/QDWTEenBs65gu57GJdvkqZ0+5steFb44g=
+github.com/aws/aws-sdk-go v1.48.9/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
 github.com/bazelbuild/rules_go v0.24.5 h1:8S5qilf+Il5/TPMZQIOfzQDAZtkhB4jALiAnwRuisDM=
 github.com/bazelbuild/rules_go v0.24.5/go.mod h1:MC23Dc/wkXEyk3Wpq6lCqz0ZAYOZDw2DR5y3N1q2i7M=
 github.com/beltran/gohive v1.4.0 h1:aACOAXFo1ok3D4eRXmKxWuqxJ/1aje7mzUhAADgPq0A=
@@ -1538,6 +1540,7 @@ golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5y
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d h1:sK3txAijHtOK88l68nt020reeT1ZdKLIYetKl95FzVY=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
 golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20181106170214-d68db9428509/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -1589,6 +1592,7 @@ golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20170114055629-f2499483f923/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -1654,6 +1658,7 @@ golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c h1:JVAXQ10yGGVbSyoer5VILysz6YKjdNT2bsvlayjqhes=
 golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
+golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
 golang.org/x/oauth2 v0.0.0-20180227000427-d7d64896b5ff/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181106182150-f42d05182288/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -1685,6 +1690,7 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180224232135-f6cff0780e54/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -1797,10 +1803,12 @@ golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220823224334-20c2bfdbfe24 h1:TyKJRhyo17yWxOMCTHKWrc5rddHORMlnZ/j57umaUd8=
 golang.org/x/sys v0.0.0-20220823224334-20c2bfdbfe24/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U=
 golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1812,6 +1820,7 @@ golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -1908,6 +1917,7 @@ golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.9 h1:j9KsMiaP1c3B0OTQGth0/k+miLGTgLsAFUCrF2vLcF8=
 golang.org/x/tools v0.1.9/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190410155217-1f06c39b4373/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20190513163551-3ee3066db522/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/optout/file_handler.go b/optout/file_handler.go
index dafafe05e..5ee4ad312 100644
--- a/optout/file_handler.go
+++ b/optout/file_handler.go
@@ -7,7 +7,14 @@ import (
 // File handlers can load opt out files from a given source and can optionally clean them up afterwards.
 // This interface allows us to implement file loading from multiple sources, including local directories and AWS S3.
 type OptOutFileHandler interface {
+	// Load opt out files from the given path.
+	//
+	// Return a list of metadata parsed from valid filenames,
+	// and the number of files skipped due to unknown filenames.
 	LoadOptOutFiles(path string) (suppressList *[]*OptOutFilenameMetadata, skipped int, err error)
+	// Cleanup any opt out files that were successfully imported, and handle
+	// any files that failed to be imported.
 	CleanupOptOutFiles(suppressList []*OptOutFilenameMetadata) error
+	// Open a given opt out file, specified by the metadata struct.
 	OpenFile(metadata *OptOutFilenameMetadata) (*bufio.Scanner, func(), error)
 }
diff --git a/optout/local_file_handler.go b/optout/local_file_handler.go
index d769764d9..225399a54 100644
--- a/optout/local_file_handler.go
+++ b/optout/local_file_handler.go
@@ -11,6 +11,7 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+// LocalFileHandler manages files from local directories.
 type LocalFileHandler struct {
 	Logger                 logrus.FieldLogger
 	PendingDeletionDir     string
diff --git a/optout/s3_file_handler.go b/optout/s3_file_handler.go
index f87aa8488..89a5a77f2 100644
--- a/optout/s3_file_handler.go
+++ b/optout/s3_file_handler.go
@@ -1 +1,220 @@
 package optout
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"strings"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/aws/aws-sdk-go/service/s3/s3manager"
+	"github.com/sirupsen/logrus"
+)
+
+// S3FileHandler manages files located on AWS S3.
+type S3FileHandler struct {
+	Logger logrus.FieldLogger
+	// Optional S3 endpoint to use for connection.
+	Endpoint string
+	// Optional role to assume when connecting to S3.
+	AssumeRoleArn string
+}
+
+// Define logger functions to ensure that logs get sent to:
+// 1. Splunk (Logger.*)
+// 2. stdout (Jenkins)
+
+func (handler *S3FileHandler) Infof(format string, rest ...interface{}) {
+	fmt.Printf(format, rest...)
+	handler.Logger.Infof(format, rest...)
+}
+
+func (handler *S3FileHandler) Warningf(format string, rest ...interface{}) {
+	fmt.Printf(format, rest...)
+	handler.Logger.Warningf(format, rest...)
+}
+
+func (handler *S3FileHandler) Errorf(format string, rest ...interface{}) {
+	fmt.Printf(format, rest...)
+	handler.Logger.Errorf(format, rest...)
+}
+
+func (handler *S3FileHandler) LoadOptOutFiles(path string) (suppressList *[]*OptOutFilenameMetadata, skipped int, err error) {
+	var result []*OptOutFilenameMetadata
+
+	bucket, prefix, err := parseS3Uri(path)
+	if err != nil {
+		handler.Errorf("Failed to parse S3 path: %s", err)
+		return &result, skipped, err
+	}
+
+	sess, err := handler.createSession()
+	if err != nil {
+		handler.Errorf("Failed to create S3 session: %s", err)
+		return &result, skipped, err
+	}
+
+	svc := s3.New(sess)
+
+	handler.Infof("Listing objects in bucket %s, prefix %s", bucket, prefix)
+
+	resp, err := svc.ListObjects(&s3.ListObjectsInput{
+		Bucket: aws.String(bucket),
+		Prefix: aws.String(prefix),
+	})
+
+	if err != nil {
+		handler.Errorf("Failed to list objects in S3 bucket %s, prefix %s: %s", bucket, prefix, err)
+		return &result, skipped, err
+	}
+
+	for _, obj := range resp.Contents {
+		metadata, err := ParseMetadata(*obj.Key)
+		metadata.FilePath = fmt.Sprintf("s3://%s/%s", bucket, *obj.Key)
+		metadata.DeliveryDate = *obj.LastModified
+
+		if err != nil {
+			// Skip files with a bad name.  An unknown file in this dir isn't a blocker
+			handler.Warningf("Unknown file found: %s. Skipping.", metadata)
+			skipped = skipped + 1
+			continue
+		}
+
+		result = append(result, &metadata)
+	}
+
+	return &result, skipped, err
+}
+
+func (handler *S3FileHandler) OpenFile(metadata *OptOutFilenameMetadata) (*bufio.Scanner, func(), error) {
+	handler.Infof("Opening file %s", metadata.FilePath)
+	bucket, file, err := parseS3Uri(metadata.FilePath)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sess, err := handler.createSession()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	downloader := s3manager.NewDownloader(sess)
+	buff := &aws.WriteAtBuffer{}
+	numBytes, err := downloader.Download(buff, &s3.GetObjectInput{
+		Bucket: aws.String(bucket),
+		Key:    aws.String(file),
+	})
+
+	if err != nil {
+		handler.Errorf("Failed to download bucket %s, key %s", bucket, file)
+		return nil, nil, err
+	}
+
+	handler.Infof("file downloaded: size=%d", numBytes)
+
+	byte_arr := buff.Bytes()
+	sc := bufio.NewScanner(bytes.NewReader(byte_arr))
+	return sc, func() {}, err
+}
+
+func (handler *S3FileHandler) CleanupOptOutFiles(suppresslist []*OptOutFilenameMetadata) error {
+	sess, err := handler.createSession()
+	if err != nil {
+		return err
+	}
+
+	errCount := 0
+	for _, suppressionFile := range suppresslist {
+		if !suppressionFile.Imported {
+			// Don't do anything. The S3 bucket should have a retention policy that
+			// automatically cleans up files after a specified period of time,
+			handler.Warningf("File %s was not imported successfully. Skipping cleanup.", suppressionFile)
+			continue
+		}
+
+		handler.Infof("Cleaning up file %s", suppressionFile)
+
+		bucket, file, err := parseS3Uri(suppressionFile.FilePath)
+		if err != nil {
+			return err
+		}
+
+		svc := s3.New(sess)
+		_, err = svc.DeleteObject(&s3.DeleteObjectInput{Bucket: aws.String(bucket), Key: aws.String(file)})
+
+		if err != nil {
+			handler.Errorf("File %s failed to clean up properly, error occurred while deleting object: %v", suppressionFile, err)
+			errCount++
+			continue
+		}
+
+		err = svc.WaitUntilObjectNotExists(&s3.HeadObjectInput{
+			Bucket: aws.String(bucket),
+			Key:    aws.String(file),
+		})
+
+		if err != nil {
+			handler.Errorf("File %s failed to clean up properly, error occurred while waiting for object to be deleted: %v", suppressionFile, err)
+			errCount++
+			continue
+		}
+
+		handler.Infof("File %s successfully ingested and deleted from S3.", suppressionFile)
+	}
+
+	if errCount > 0 {
+		return fmt.Errorf("%d files could not be cleaned up", errCount)
+	}
+
+	return nil
+}
+
+// Creates a new AWS S3 session. If the handler is given a custom S3 endpoint
+// and/or IAM role ARN to assume, the new session connects using those parameters.
+func (handler *S3FileHandler) createSession() (*session.Session, error) {
+	sess := session.Must(session.NewSession())
+
+	config := aws.Config{
+		Region: aws.String("us-east-1"),
+	}
+
+	if handler.Endpoint != "" {
+		config.S3ForcePathStyle = aws.Bool(true)
+		config.Endpoint = &handler.Endpoint
+	}
+
+	if handler.AssumeRoleArn != "" {
+		config.Credentials = stscreds.NewCredentials(
+			sess,
+			handler.AssumeRoleArn,
+		)
+	}
+
+	return session.NewSessionWithOptions(session.Options{
+		Config: config,
+	})
+}
+
+// Parses an S3 URI and returns the bucket and key.
+//
+// @example:
+//   input: s3://my-bucket/path/to/file
+//   output: "my-bucket", "path/to/file"
+//
+// @example
+//   input: s3://my-bucket
+//   output: "my-bucket", ""
+//
+func parseS3Uri(str string) (bucket string, key string, err error) {
+	workingString := strings.TrimPrefix(str, "s3://")
+	resultArr := strings.SplitN(workingString, "/", 2)
+
+	if len(resultArr) == 1 {
+		return resultArr[0], "", nil
+	}
+
+	return resultArr[0], resultArr[1], nil
+}
diff --git a/shared_files/encrypted/local.env b/shared_files/encrypted/local.env
index e8a85fb6f..956050224 100644
--- a/shared_files/encrypted/local.env
+++ b/shared_files/encrypted/local.env
@@ -1,120 +1,122 @@
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