He is best known for screenwriting and producing and/or directing science fiction and horror B-movies such as King Dinosaur (1955), The Amazing Colossal Man (1957), Earth vs. the Spider (1958), Village of the Giants (1965), The Food of the Gods (1976), and Empire of the Ants (1977).

He later edited British feature films to fit half-hour time slots and became a production assistant on Racket Squad and camera man on Serpent Island (1954).

[9] AIP distributed some of his other late-50s opuses, such as Earth vs the Spider, Beginning of the End (featuring Peter Graves),[10] and Attack of the Puppet People.

All three appeared together in the celebrity lineup at the 2006 Monster Bash, held June 23–25 at the Pittsburgh International Airport Four Points Hotel.

Sony Pictures Home Entertainment released a Midnite Movies double DVD set with the rarely seen The Boy and the Pirates, and Crystalstone (1987), on June 27, 2006.

The Spider, War of the Colossal Beast, The Magic Sword, Tormented, Beginning of the End, and Village of the Giants were featured on the film-spoofing series Mystery Science Theater 3000.