He is best known for his roles as Sergeant Phil Bellamy in the BBC One police procedural series The Bill (1992–1998) and as Sergeant Eddie Hargreaves in the ITV soap Emmerdale (2003–2007).
Sheridan has also appeared in a number of other television series, including Casualty (1989, 1991, 1998, 2010), Heartbeat (1994, 2004), Peak Practice (1995, 1997), Coronation Street (1999), Doctors (2001), and Hollyoaks: Let Loose (2005).
In addition to his television work, Sheridan has also appeared in several films, including "Empire State" (2013) and "The Lady in the Van" (2015).
He has also had roles in a number of stage productions, including "The Real Inspector Hound" (1989), "The Madness of King George III" (1992), and "The Importance of Being Earnest" (1995).
Sheridan is a member of the Equity trade union.
He is also patron of the Siloam Mission Manchester.