Andrew “Grumps” Thomas is a legendary Jamaican producer who was an engineer for both Penthouse Records in the early 90’s, as well as Shocking Vibes after training at the Grove Recording Studio and Roof International label in the late 90’s. Thomas is now Beenie Man’s official live sound engineer. The petname “Grumps” comes from Tanto Metro calling him a “Grumpy old man” from their Shocking Vibes days (Thomas was very finicky about the music).