co-worker.
what is the person who works in a coal mine called? A MINER!!!
A person who works in archives is called an archivist.
A person who works on a car is known as a mechanic.
A person who works to manage relations is called a negotiator.
This person works as a gemologist.
A person who works on clocks is called a horologist.
Guerrilla
a librarian
Machinist.
An electrician.
porter
A person who studies or works in one particular area of a subject is called a specialist.