Off the top of my head....medical software companies almost always require it (hey, it's basically free for them, since they have their own labs), any company w

Off the top of my head....medical software companies almost always require it (hey, it's basically free for them, since they have their own labs), any company with older tech like Coldfusion, ADA, etc seem to test to weed out developers who are scraping the bottom barrel due to undisclosed personal problems, financial/real-estate software companies, and this is all on top of rigorous background checks that may or may not matter. The drug test matters.