Career
He is the current assistant coach of Catalan Dragons. He played with the Canberra Raiders from 2001 to 2003. Monaghan joined Manly-Warringah Sea Eagles in 2004 as halfback, but changed to hooker at the start of the 2006 season due to the purchase of halfback Matt Orford from Melbourne Storm.
He played in the 2007 NRL grand final defeat by Melbourne Storm.
The 27-year-old joined Manly teammate Chris Hicks in moving to Warrington for 2008"s Super League XIII. In March 2009 rumours emerged linking him with his former club Canberra and playing alongside brother Joel Monaghan again. In May 2014, Monaghan announced he would be retiring at the end of the season.
2006 Ken Stephen award.