Dunsworth began acting in numerous
CBC radio dramas after dropping out of university, and had starring roles in many stage productions at the
Neptune Theatre in Halifax. In 1970, he leased an abandoned building on Halifax's waterfront and converted it into a playhouse called the Pier One Theatre; it became the city's first and most successful alternative theater. In the late 1980s,
Dalhousie University hired him to produce the university's welcome show for new students at the Rebecca Cohn Auditorium, in which he also occasionally had an unseen voice-over role. In 1987, he founded the
casting agency Filmworks Casting and garnered a reputation as Halifax's most successful casting director. which followed his journey as an underdog political candidate for the
New Democratic Party in the
Halifax Bedford Basin electoral ward during the
1988 Nova Scotia general election. He came third in the election, receiving 19.3% of the vote (2,746 votes). While filming a scene in a school during the production of the film
Pit Pony (1997), in which he had a small role, Dunsworth is said to have discovered 10-year-old actor and future
Trailer Park Boys cast member
Elliot Page; he managed to get Page a large part in the film, which became Page's first screen credit. He also starred in
Haven (2010–2015), the television adaptation of the
Stephen King novel
The Colorado Kid. He reunited with many of his
Trailer Park Boys castmates in the new series
The Drunk and On Drugs Happy Fun Time Hour (2010). ==Personal life==