Timmons first came to prominence at inter-county level alongside his brother
Joe as a player with his adopted
Wicklow, however, he was persuaded to join the Dublin GAA|Dublin] senior team in 1958. He made his first appearance for the team against
Meath and ended his debut season with an
All-Ireland medal after a defeat of
Derry in the
final. Timmons won five Leinster Championship medals in total, including one as
team captain, while he also collected a second All-Ireland title after the
1963 final defeat of
Galway. He also won back-to-back
Railway Cup medals with
Leinster. ==Personal life and death==