In July 2006, Brownfield was announced as one of the first writing talents on board with the freshly minted Fangoria Comics, an offshoot imprint of the popular horror magazine. He was announced as an Associate Editor for the line. He stayed with the line when they departed to become The Scream Factory, and again through their relationship with Fangoria Graphix. As of 2010, The Scream Factory again operates on its own, with Brownfield still Associate Editor. It was announced in February 2010 that Brownfield would be writing "Tales from Wonderland: The White Knight" for Zenescope. In November 2010, Brownfield and former Newsarama editor Matt Brady were announced as the writers of Dynamite's Buck Rogers Annual #1, due in February 2011. Brownfield and Brady co-wrote a story for the Batman 80 Page Giant 2011, released in August. In November, Brownfield announced that he and artist Sarah Vaughn would launch a webcomic, Sparkshooter, in February 2012; Enkaru (Encar Robles) drew #3-13, Kate Frizzell drew #14-15, and Malik O. Smith drew #16. Brownfield was announced as the new regular writer for "Grimm Fairy Tales Myths & Legends" by Zenescope Entertainment Executive Editor Raven Gregory in early summer 2012; Brownfield's first issue, #18, appeared in July. In February 2014, Brownfield was announced as the writer for a new ongoing series from Dynamite Entertainment, The Blood Queen, beginning in June. In May 2014, Dynamite Entertainment published an eBook by Brownfield, a novel titled Prince Dracula; the paperback version became available in July 2014. He was the Editor-in-Chief of Imminent Press. Brownfield published a horror short story collection, INHABITED, in 2019.