After a drug conviction, can you ever get hired?

Dear Annie: I just read your column on job hunting with a flawed credit history („Bad credit, no job?” July 2010). I have an even worse problem. About 14 years ago, when I was a junior in college, I made a totally idiotic error in judgment involving drugs. I was arrested and convicted and did some jail time. When I got out, I finished college — I was a computer science major with a minor in engineering — and an uncle of mine hired me as an IT guy in a company owned by my family.