Way back in '95 I was in the military until they tested me positive for pot. It was a one-time incident, and I've never done it before or since. I was separated, of course, and since then I've gotten great credit, a stable family life, and a good job. However, I recently applied for a contract job with an employer on a Navy base, and they require me to pass a security clearance. I'm betting they won't pass me, as I received an other-than-honorable discharge back then. 

My question is - does the Navy have an unforgettable memory in regards to these kinds of things? Do they never forgive or take into consideration events/progression since then? I mean, what if you had an OTH back in 1968 - would they say 40 years later, "Oh, you had an OTH discharge; sorry, you're not getting clearance"? It seems a bit ridiculous if this is true, but I wanted to get some input. 

Has anyone run into this? What can I expect?

Well, supposedly that little wench Monica Lewinsky was able to get a TS clearance at the DOD, after her little fling at the WH  with the CINC!