UCD made it two-in-a-row with a deserved win over cork Cons at Temple Hill.
The sides were level 12-12 at half-time with Mahony accounting for all the home teams points kicking four penalties.
UCD scores coming from man-of-the-match O'Sullivan with two tries one which was converted by Hickey.
UCD dominated the second half two penalties from Hickey ensured a first ever win for the students over Cork Cons.