He plays for the Down senior inter-county football team and with his local club Dundrum GAA.
He started at corner forward and scored three points in the 2010 All-Ireland Football Final where Down were defeated 0-15 to 0-16 by Cork.
[citation needed] McComiskey is 1 of six Down players offered contracts in Aussie rules teams James Colgan, Martin Clarke Jamie O'Reilly Caolan Mooney and Connor Gough.
McComiskey scoring 1-4 and getting the man of the match and a first Ulster medal Down lost the All-Ireland semi-final to Kildare.
Down won back to back Ulster Under-21 Championship this time beating Armagh it was a close game but Peter Fitzpatrick and Michael Magee on top in midfield Down won thanks to a late goal scored by Mark Poland's younger brother Conor Paul scoring 4 points giving him a second Ulster medal.
Then Down played Kildare in the semi-final, with Down coming out on the right side with a two-point win 1-16 to 1-14, McComiskey scoring a point.