I have never heard of a job that tests for AAS as part of routine testing or for initial hiring. I was in a police academy which is known for testing the ever loving hell out of each recruit mentally (poly, background check, psych eval, etc) and physically (pretty thorough rec and script med testing).....and there was still no AAS testing.
The only times where I have heard of people being tested for AAS was if they had been busted for it and were on probation, they were ratted out for using and have specific jobs that are very against AAS use (military, police, etc), or they had an incident/altercation that suggested roids may have influenced it (looking jacked and getting into physical alteractions while employed as a firefighter for example). Despite those possible situations, I've still seen my fair share of jacked and clearly AAS enhanced military personnel and police officers that didn't seem to be afraid of being tested for it.