Good reasoning of his id as a native. The rest of your profile strayed when you extrapolated w/o considering some facts. There's the fact the guy produced the slime. You need to consider what it would take in knowledge and equipment. He's a chemist/chem engineer, or related. It takes that kind of knowledge and most importantly, understanding that knowledge, to make a good slime. He also picked the nastiest standard bug. It's somewhat resistant to penicillin. He's definitly got a degree and a long time in industry. He's not a technician. This guy's got a high enough position that he is free to operate in the facilities w/o folks questioning what he's up to. If he only has a BS degree he's an old guy, about to retire. Else he's a little younger and has a higher degree.
Somehow he obtained the Ames bug. So he's got clout, or works/has access to antibiotic testing, or R&D. Else someone going over the PO's would ask, "what the hell's the anthrax for?" He bypassed supervision.