My thoughts on over-qualification.
“Many employers’ concerns about underqualified or overqualified candidates center on whether your experience (or lack thereof) will alienate you from the rest of the team. If you are a bit lacking in experience, take special care to convey an air of poise, maturity, and professionalism. If you’re overqualified for the position, make sure your interview demeanor is consistent with a humble team player who is eager to learn and fit in. You just might find that having the right attitude is much more important to your future employer than having the perfect qualifications.”