He spent two years making films mostly for Paramount.

He was a cast member of the lost film The Miracle Man.

[2] Dumont appeared in films with Robert Warwick, Lon Chaney, Mary Miles Minter, Roscoe Arbuckle and Wallace Reid.

After he apparently left film in 1921, it is unknown what his later activities were.

Dumont died in Los Angeles in December 1959.