Regarded as one of the best Derry
minor players of all time, He was part of Derry's 1993
Ulster Championship and All-Ireland winning team, which defeated
Cork in the final. McCusker added a second Ulster Championship medal in 1998. He won
National Football League medals with Derry in 1992, 1995, 1996 and 2000??, and retired from inter-county football in 2000. In September 2008 McCusker was appointed part of a special selection committee set up by the Derry County Board, to interview the candidates for the vacant Derry Senior, Under 21 and Minor managers' positions in both football and hurling. Following the committee's recommendations,
Damian Cassidy was formally ratified as new Derry Senior football manager at the county board meeting on 7 October. ==Club career==