A person who contributes to the fulfillment of a need or furtherance of an effort or purpose; SYN. helper, help, supporter.

coworker

ETYM French collčgue, Latin collega one chosen at the same time with another, a partner in office; col- + legare to send or choose as deputy. Related to Legate.
1. A person who is member of one's class or profession; SYN. confrere, fellow.
2. An associate one works with; SYN. co-worker, fellow worker, workfellow.

A writer whose work is published in a newspaper or magazine or as part of a book.