I have a felony on my record (possession of marijuana) and was wondering if that would effect me getting a job

with a coorporation. The charge is over 7 years old and I have not been in any trouble since. I also have my ociates degree and a stellar resume. #1 in sales 2 years in a row at a Fortune 100 company with proof. Luckily that company didnt do a background check on me for some reason. I work for a mid level medical supply company now and want to change jobs, but I am wondering if I should even bother. I was turned down by several companys when the charge was 5-6 years old ie. Dell, Pitney Bowes. Please advise. I still have to wait 2 more year before i can apply for a pardon in my state Tennessee.