As a librettist, Ngema has written the musical soundtrack for "Sarafina - the movie" and produced the movie's soundtrack alongside Quincy Jones. He has composed several music albums, including the famous and locally loved album "Stimela SaseZola". Ngema has written and arranged numerous songs as well as arranged music for artists such as Michael Bolton. He was also one of the vocal arrangers for "The Lion King", Disney's animated film. For this, Ngema received a multi-platinum award for sales in excess of 6 million copies. He subsequently won a Grammy Award for the movie adaptation. "Woza My Fohloza", the new millennium song, and several albums of his musicals are on Ngema's librettist list.