Research Engineer with physics background, before that laser research physicist, before that 5+ years of physics grad school, before that math+physics double major in college.
Have also been: tutor, outdoor guide, camp counselor, teaching assistant, dog sitter, some other stuff.
Unless you secretly hate being an F and/or REALLY wish you were NTJ I don't recommend what I've done to INFP's, or any NF, or any F for that matter. With that said, I think INFJ's would have the best shot of making it through. INFJ's are considered the most T-like of all the F's. At my workplace of ~100 people, I know of only 2 NF's. It gets lonely, and very depressing.