He is best known for his role as Raze in the Underworld film series, which he co-created, as well as his voicework in the cartoon Young Justice as the villain Black Beetle.

[1][2] Grevioux began taking screenwriting and cinematography classes as well, and after his first semester of grad school had finished, he moved to Los Angeles to begin to work as a writer in earnest.

The Darkstorm Studios imprint was a more mature line, including the books Alivs Rex,[7] Skull and Guns and Uzan, The Mighty.

In the commentary track of Underworld, he relates that during the promotion and launch of the film, many fans asked him if his voice had been altered by computer, and were surprised to learn that it had not been.

[11] He is also in the process of writing a story featuring Lee Falk's characters The Phantom and Mandrake the Magician, co-written with Mike Bullock.

[16] The story follows the original monster of Victor Frankenstein who is the only force that stands between the human race and an uprising of supernatural creatures determined to overthrow the world.