In my jurisdiction the only ones formally exempted from jury duty are those who are employed in the courtrooms: judges, bailiffs, and court reporters.
There are several other occupations that, while not formally exempt, are almost guaranteed to result in you not being picked: law enforcement, child protective services, district attorney office, criminal defense attorney.
Hell, both times I was actually asked to come in, they dismissed me just for having friends who were cops.
Funny, both times I’ve been summoned they dismissed me for stating (honestly) that I hate cops in general and would not be impartial at all.