diff --git a/R/rforcecom.createBulkJob.R b/R/rforcecom.createBulkJob.R
index 00ae5c5..9096a8e 100644
--- a/R/rforcecom.createBulkJob.R
+++ b/R/rforcecom.createBulkJob.R
@@ -7,6 +7,7 @@
 #'                                            'query', 'upsert', 
 #'                                            'update', 'hardDelete'),
 #'                                object='Account',
+#'                                contentType=c('CSV', 'ZIP_CSV', 'ZIP_XML', 'ZIP_JSON'),
 #'                                externalIdFieldName=NULL,
 #'                                concurrencyMode='Parallel')
 #' @concept bulk job salesforce api
@@ -14,6 +15,7 @@
 #' @param session a named character vector defining parameters of the api connection as returned by \link{rforcecom.login}
 #' @param operation a character string defining the type of operation being performed
 #' @param object a character string defining the target salesforce object that the operation will be performed on
+#' @param contentType a character string being one of 'CSV','ZIP_CSV','ZIP_XML', or 'ZIP_JSON'
 #' @param externalIdFieldName a character string identifying a custom field that has the "External ID" attribute on the target object. 
 #' This field is only used when performing upserts. It will be ignored for all other operations.
 #' @param concurrencyMode a character string either "Parallel" or "Serial" that specifies whether batches should be completed
@@ -43,19 +45,15 @@ rforcecom.createBulkJob <-
   function(session, operation=c('insert', 'delete', 'query',
                                 'upsert', 'update', 'hardDelete'), 
            object='Account', 
+           contentType=c('CSV', 'ZIP_CSV', 'ZIP_XML', 'ZIP_JSON'),
            externalIdFieldName=NULL,
            concurrencyMode='Parallel'){
     
-    if(operation=='upsert'){
+    if(operation == 'upsert'){
       stopifnot(!is.null(externalIdFieldName))
     }
     
-    if (object == 'Attachment') {
-      if (operation != 'insert') stop('only insert operations are supported for the Attachment object')
-      contentType <- 'ZIP_CSV'
-    } else {
-      contentType <- 'CSV' # user cannot control type  
-    }
+    contentType <- match.arg(contentType)
     
     # XML Body
     xmlBody <- paste0('<?xml version="1.0" encoding="UTF-8"?>
diff --git a/man/rforcecom.createBulkJob.Rd b/man/rforcecom.createBulkJob.Rd
index 2546647..b1a1863 100644
--- a/man/rforcecom.createBulkJob.Rd
+++ b/man/rforcecom.createBulkJob.Rd
@@ -9,6 +9,7 @@ rforcecom.createBulkJob(session,
                                            'query', 'upsert', 
                                            'update', 'hardDelete'),
                                object='Account',
+                               contentType=c('CSV', 'ZIP_CSV', 'ZIP_XML', 'ZIP_JSON'),
                                externalIdFieldName=NULL,
                                concurrencyMode='Parallel')
 }
@@ -19,6 +20,8 @@ rforcecom.createBulkJob(session,
 
 \item{object}{a character string defining the target salesforce object that the operation will be performed on}
 
+\item{contentType}{a character string being one of 'CSV','ZIP_CSV','ZIP_XML', or 'ZIP_JSON'}
+
 \item{externalIdFieldName}{a character string identifying a custom field that has the "External ID" attribute on the target object. 
 This field is only used when performing upserts. It will be ignored for all other operations.}