 He first played with his province in 1996 as Munster defeated Ulster to set up a final date with Leinster.The men from the eastern province ran away with the victory in the end and defeated Ó Sé's side by 1–13 to 0–9.After a few disappointing seasons where Ó Sé failed to be picked or faced defeat, Munster were back in the final again in 1999.