He co-authored the book Gaelic Football Training Drills (ISBN 0952389304) by COS Productions.
At club level O'Shea managed Dr Crokes to successive Kerry County Finals in 2005 and 2006.
Despite being the manager of Kerry he also continued to coach Dr Crokes in their Senior Club Football Championship, which ultimately ended in defeat in the Final Replay in April 2007.
[1] O'Shea returned to take over the Dr Crokes senior team in 2016 and managed them to victory in the 2016 County Championship Final.
On St Patrick's Day 2017, Dr Crokes won their second All Ireland Senior Club Championship, defeating Slaughtneil in the final.