diff --git a/salesforce/bulk.go b/salesforce/bulk.go
index c5b4a27..b2e9274 100644
--- a/salesforce/bulk.go
+++ b/salesforce/bulk.go
@@ -9,20 +9,17 @@ import (
 	"github.com/gocarina/gocsv"
 )
 
-type BulkJob struct {
-	Object    string `json:"object"`
-	Operation string `json:"operation"`
+type BulkJobCreationRequest struct {
+	Object              string `json:"object"`
+	Operation           string `json:"operation"`
+	ExternalIdFieldName string `json:"externalIdFieldName"`
 }
 
-type BulkJobCreationResponse struct {
+type BulkJob struct {
 	Id    string `json:"id"`
 	State string `json:"state"`
 }
 
-type BulkJobState struct {
-	State string `json:"state"`
-}
-
 type BulkJobData struct {
 	Data string `json:"data"`
 }
@@ -33,7 +30,7 @@ const (
 )
 
 func updateJobState(jobId string, state string, auth Auth) error {
-	abortJob := BulkJobState{State: state}
+	abortJob := BulkJob{State: state}
 	abortBody, _ := json.Marshal(abortJob)
 	_, abortErr := doRequest("PATCH", "/jobs/ingest/"+jobId, JSONType, auth, string(abortBody))
 	if abortErr != nil {
@@ -42,7 +39,7 @@ func updateJobState(jobId string, state string, auth Auth) error {
 	return nil
 }
 
-func createBulkJob(auth Auth, body []byte) (*BulkJobCreationResponse, error) {
+func createBulkJob(auth Auth, body []byte) (*BulkJob, error) {
 	resp, err := doRequest("POST", "/jobs/ingest", JSONType, auth, string(body))
 	if err != nil {
 		return nil, err
@@ -56,7 +53,7 @@ func createBulkJob(auth Auth, body []byte) (*BulkJobCreationResponse, error) {
 		return nil, readErr
 	}
 
-	bulkJob := &BulkJobCreationResponse{}
+	bulkJob := &BulkJob{}
 	jsonError := json.Unmarshal(respBody, bulkJob)
 	if jsonError != nil {
 		return nil, jsonError
@@ -65,6 +62,31 @@ func createBulkJob(auth Auth, body []byte) (*BulkJobCreationResponse, error) {
 	return bulkJob, nil
 }
 
+func uploadJobData(auth Auth, records any, bulkJob BulkJob) error {
+	sObjects := records
+	csvContent, csvErr := gocsv.MarshalString(sObjects)
+	if csvErr != nil {
+		updateJobState(bulkJob.Id, JobStateAborted, auth)
+		return csvErr
+	}
+
+	resp, uploadDataErr := doRequest("PUT", "/jobs/ingest/"+bulkJob.Id+"/batches", CSVType, auth, csvContent)
+	if uploadDataErr != nil {
+		updateJobState(bulkJob.Id, JobStateAborted, auth)
+		return uploadDataErr
+	}
+	if resp.StatusCode != http.StatusCreated {
+		updateJobState(bulkJob.Id, JobStateAborted, auth)
+		return processSalesforceError(*resp)
+	}
+	stateErr := updateJobState(bulkJob.Id, JobStateUploadComplete, auth)
+	if stateErr != nil {
+		return stateErr
+	}
+
+	return nil
+}
+
 func (sf *Salesforce) InsertBulk(sObjectName string, records any) error {
 	authErr := validateAuth(*sf)
 	if authErr != nil {
@@ -75,7 +97,7 @@ func (sf *Salesforce) InsertBulk(sObjectName string, records any) error {
 		return typErr
 	}
 
-	job := BulkJob{
+	job := BulkJobCreationRequest{
 		Object:    sObjectName,
 		Operation: "insert",
 	}
@@ -92,25 +114,115 @@ func (sf *Salesforce) InsertBulk(sObjectName string, records any) error {
 		return errors.New("error creating bulk data job. Id does not exist or job closed prematurely")
 	}
 
-	sObjects := records
-	csvContent, csvErr := gocsv.MarshalString(sObjects)
-	if csvErr != nil {
-		updateJobState(bulkJob.Id, JobStateAborted, *sf.auth)
-		return csvErr
+	uploadErr := uploadJobData(*sf.auth, records, *bulkJob)
+	if uploadErr != nil {
+		return uploadErr
 	}
 
-	resp, uploadDataErr := doRequest("PUT", "/jobs/ingest/"+bulkJob.Id+"/batches", CSVType, *sf.auth, csvContent)
-	if uploadDataErr != nil {
-		updateJobState(bulkJob.Id, JobStateAborted, *sf.auth)
+	return nil
+}
+
+func (sf *Salesforce) UpdateBulk(sObjectName string, records any) error {
+	authErr := validateAuth(*sf)
+	if authErr != nil {
+		return authErr
+	}
+	typErr := validateOfTypeSlice(records)
+	if typErr != nil {
+		return typErr
+	}
+
+	job := BulkJobCreationRequest{
+		Object:    sObjectName,
+		Operation: "update",
+	}
+	body, jsonError := json.Marshal(job)
+	if jsonError != nil {
+		return jsonError
+	}
+
+	bulkJob, err := createBulkJob(*sf.auth, body)
+	if err != nil {
 		return err
 	}
-	if resp.StatusCode != http.StatusCreated {
-		updateJobState(bulkJob.Id, JobStateAborted, *sf.auth)
-		return processSalesforceError(*resp)
+	if bulkJob.Id == "" || bulkJob.State != "Open" {
+		return errors.New("error creating bulk data job. Id does not exist or job closed prematurely")
 	}
-	stateErr := updateJobState(bulkJob.Id, JobStateUploadComplete, *sf.auth)
-	if stateErr != nil {
-		return stateErr
+
+	uploadErr := uploadJobData(*sf.auth, records, *bulkJob)
+	if uploadErr != nil {
+		return uploadErr
+	}
+
+	return nil
+}
+
+func (sf *Salesforce) UpsertBulk(sObjectName string, fieldName string, records any) error {
+	authErr := validateAuth(*sf)
+	if authErr != nil {
+		return authErr
+	}
+	typErr := validateOfTypeSlice(records)
+	if typErr != nil {
+		return typErr
+	}
+
+	job := BulkJobCreationRequest{
+		Object:              sObjectName,
+		Operation:           "upsert",
+		ExternalIdFieldName: fieldName,
+	}
+	body, jsonError := json.Marshal(job)
+	if jsonError != nil {
+		return jsonError
+	}
+
+	bulkJob, err := createBulkJob(*sf.auth, body)
+	if err != nil {
+		return err
+	}
+	if bulkJob.Id == "" || bulkJob.State != "Open" {
+		return errors.New("error creating bulk data job. Id does not exist or job closed prematurely")
+	}
+
+	uploadErr := uploadJobData(*sf.auth, records, *bulkJob)
+	if uploadErr != nil {
+		return uploadErr
+	}
+
+	return nil
+}
+
+func (sf *Salesforce) DeleteBulk(sObjectName string, records any) error {
+	authErr := validateAuth(*sf)
+	if authErr != nil {
+		return authErr
+	}
+	typErr := validateOfTypeSlice(records)
+	if typErr != nil {
+		return typErr
+	}
+
+	job := BulkJobCreationRequest{
+		Object:    sObjectName,
+		Operation: "delete",
+	}
+	body, jsonError := json.Marshal(job)
+	if jsonError != nil {
+		return jsonError
+	}
+
+	bulkJob, err := createBulkJob(*sf.auth, body)
+	if err != nil {
+		return err
+	}
+	if bulkJob.Id == "" || bulkJob.State != "Open" {
+		return errors.New("error creating bulk data job. Id does not exist or job closed prematurely")
+	}
+
+	uploadErr := uploadJobData(*sf.auth, records, *bulkJob)
+	if uploadErr != nil {
+		return uploadErr
 	}
 
 	return nil