@RonMilne    I recommend taking your initial CSV record file and partitioning by the " salesRepId" in to multiple new JSON records.  This can be accomplished using the PartitionRecord processor utilizing a CSVReader and a JsonRecordSetWriter.   Your PartitionRecord processor configuration would look like this:   Your CSVReader would be configured something like this (you'll need to modify it for your specific record's Schema: Note: Pop-out shows the "Schema Text" property and don't forget to set "Treat First Line as Header" property to "true" The JsonRecordSetWriter would need to be configured to produce the desired JSON record output format.  However, just leaving default configuration will out put a separate FlowFile for each unique "SalesRepId".   If you found this response assisted with your query, please take a moment to login and click on "Accept as Solution" below this post. Thank you, Matt   ... View more