He was best known for his recurring role on the Fox sitcom, Arrested Development, as J. Walter Weatherman. Some of his other roles included "Detective Nate Grossman" on the NBC Police series Crime Story and his role as "Bobick" on Daddio.
Notable recurring roles included:
*Sgt. Adams on CSI
*Miles Hutchinson on The West Wing
*"Father Conti" on American Dreams
*"Officer Mike Healy" on Oz
*"Mark Volchek" on Wiseguy
Ryan's notable stage appearances included the original Broadway production of "I'm Not Rappaport" and revivals of "On The Waterfront" and "Guys and Dolls". He also performed at most of America's major regional theatres, including Yale Repertory Theatre, Williamstown Theatre Festival, and Milwaukee Repertory Theatre.
He died in Duarte, California, following a long illness.