He was known for his roles in numerous Irish-language stage productions, including playing King Fin Varra in the television series Mystic Knights of Tir Na Nog, and voicing Grandpa Piggley Winks on the children's television series Jakers!
Over the course of this time, he played diverse characters and appeared in a number of plays by famous playwrights including Brendan Behan, Dion Boucicault and Seán O'Casey: Other stage performances include a role as Curly in John Murphy's The Country Boy and as the blind man in W. B. Yeats' On Baile's Strand.
Lamb toured America and Canada in 1990 with John Millington Synge's The Playboy of the Western World.
[1] Lamb appeared on many series broadcasts on RTÉ One, including television soap operas Fair City and Ros na Rún.
He appeared in a 1998 episode of the sitcom Father Ted and played Mr. Hasson in the British drama film The Railway Station Man, opposite Donald Sutherland and Julie Christie.