Listed Derivatives

Hey guys. New to the site. I'm curious as to what kinds of roles there are in the Listed Derivative space? Seems like a good area to be in and growing with more trades moving from OTC onto exchanges/centrally cleared.

So what are the roles? Highest to Lowest

Traders, obviously, but what else? Sales? Trading Analyst? Business Analyst? Any help would be appreciate. Thanks!

(any yes, i've tried the search function)