depends what they do... but "scientist" may be most general
there are technicians and researchers
technicians just perform tasks that researchers tell them to
researchers are deciding what needs to be done to answer a question
Rick Labs's birth name is Richard J. Labs.
stagelight person
Placebo
I have heard of black labs, and chocolate labs, and even golden labs, but never SILVER or CHARCOAL labs.
My name is asha rani
A foreman
miner
It depends on what the person is doing
A person who works in a sandwich bar is called a server, a waitress or a waiter.
A masseuse.
Concrete mason
A barista