DJ (Disc jockey)
(disc jockey) someone who plays records on a radio show or in a club where you can dance
Songwriter
someone who writes the words and usually the music of songs
Producer
someone whose job is to organize and direct the recording and production of a record
Manager
someone who is in charge of the business affairs of a singer
Vocal coach
is a trained professional who specializes in the art of voice production, development, and refinement
Public relations assistant
establishes and maintains relationships with media, clients, vendors, etc
Singer
someone who sings
Musician
a person who is skilled in playing music