Grevioux graduated from Howard University in Washington, D.C. with a degree in microbiology with minors in both chemistry and psychology, afterwards attending graduate school working towards a master’s degree in genetic engineering. Grevioux also 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. He has written several spec scripts in various genres and wrote and directed two unfinished short sci-fi films: Indigo and Thanatos. He also started a graphic novel company called DarkStorm Studios in 2003.

Early 2006 saw Grevioux form two comic book imprints, Astounding Studios and DarkStorm Studios. Grevioux’s Astounding Studios imprint was to focus on all-ages titles such as Valkyries, Guardian Heroes and The Hammer Kid. The Darkstorm Studios imprint was a more mature line, including the books Alivs Rex, Skull and Guns and Uzan, The Mighty.

On December 2, 2009, Grevioux hosted a pilot episode for a concept series, Monster Tracker, on Discovery Channel.

He sold the original screenplay for the film adaptation of his Darkstorm Studios graphic novel, I, Frankenstein, to Lakeshore Entertainment, which also produced the Underworld films. 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. Filming began on February 27, 2012.

In 2019 Grevioux portrayed The Vault Keeper in “EC Comics Presents The Vault of Horror”, a full-cast audio drama adapting the first 24 stories from the first six issues of the original EC comic series.