He also starred on Blue Heelers as Constable Adam Cooper from 1994 to 1998, and returned for the series finale in 2006. He has also had guest starring roles on Neighbours in 1993, The Secret Life of Us (2001) as Mac, Marshall Law (2002), Stingers (2003), Wilfred (2007), All Saints (2008) and Terra Nova (2011).
His film work includes Halifax f.p. (2000), He Died with a Felafel in His Hand (2001), Ned Kelly (2003) and Macbeth (2006).
In 2008 he hosted the Seven Network's factual series Crash Investigation Unit and appeared in the Bell Shakespeare production of Pericles, Prince of Tyre. He also went back to his theatre roots with a B Sharp production of A View of Concrete.
In 2009 Walshe-Howling was nominated for Cleo Bachelor of the Year. He was set to star in Point Break 2:Indo, however due to the global financial crisis the movie did not go ahead. Walshe-Howling hosted Flickerfest 2009, then started filming The Reef with ex-Underbelly co-star Gyton Grantley. The movie was released in Australian cinemas in March 2011.
In 2010 he hosted the Nine Network's reality show Customs; and in 2012, he appeared in Australian TV drama series, Bikie Wars: Brothers in Arms as Bandidos Vice President Mario 'Chopper' Cianter, and also appeared in Play School. In 2013, he had a supporting role in Mystery Road and in 2014 he appeared in a supporting role in the ABC TV comedy drama series, Old School.
