His feature films include Bug (1975), Jaws 2 (1978), Somewhere in Time (1980), Supergirl (1984) and Santa Claus: The Movie (1985). During the 1990s, he worked in his country of birth where he directed three feature films including La Vengeance d'une blonde (1994). Afterwards, he returned to the United States where he directed television films and series.[2]
In 2003, Szwarc joined the crew of The WB/CW television series Smallville as a director. One of the major episodes he directed was "Homecoming", the 200th episode of the series.
Szwarc co-directed, with Miguel Sapochnik, the fifth and final season premiere of the science-fiction/crime series Fringe. He has directed multiple other episodes of the series throughout its run.
