This is where maintaining good contacts really helps. Ten years put me way past UPT, but I researched and was able to find old supervisors and co-workers from friends, old Xmas cards, phone book etc. Biggest help actually, was my security clearance paperwork. I highly recommend everyone keep a hard copy of their latest, and pencil in updates to contacts as necessary.

When it comes to background or employment checks, it really pays off to have current contacts and phone #'s so investigators/employers don't have to waste a lot of time on you.