Will an expunged record for possession of marijuana (misdemeanor) in Michigan show up on a state/federal background check?

I was arrested in 2010 for possession of marijuana in the state of Michigan. Plead no contest under statute 7411. I was given one- year probation, I completed all terms and after six months was released from probation. Under 7411, record was expunged. I have recently been offered a job at a clinical treatment center in Pennsylvania as a researcher. I have been told that I will need to apply for state/federal background check and a child abuse clearance.