My website which enjoyed some good rankings over the years was severly penalised by Google in the January 2013 updates. We had pursued some aggressive link building strategies in the past, which worked quite well until (I'm guessing) we were caught out. Our rankings dropped from the first page to more than 20 pages deep for every keyword other than our company name. We received no notification in our Google webmaster tools account so I do not believe I am able to submit a reconsideration request.
I'm looking for advice from a Freelancer who has had concrete experience in dealing with this problem before, i.e. success in having brought websites back from the dead.
In your bid, I would like you to convey your experience, your view on this situation and a brief indication of what you would do if awarded the bid.