[2] Brownfield attended Indiana State University, where he eventually earned a master's degree in English focusing on Creative Writing.
While an undergraduate student, Brownfield wrote a number of items for ISU's Indiana Statesman, including a catch-all column called "My Opinion, Not Yours".
In 1999, Brownfield created ShotgunReviews.com, a site intended to give young writers a place to sharpen their work.
OJ Flow (comic columnist), Corey Henson (wrestling columnist), Eric Barker (film critic), Matt McConnell (anime critic), Ian King (feature writer), Steve Ekstrom and many more (including numerous members of Birdsong's hip-hop review crew).
Brownfield closed the final version of the site in 2012 after a thirteen-year run to focus on his comics writing.
[7] 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.
[8] 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.
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.
Since 2017, Brownfield has written comics with Brazilian publishers and studios associated with frequent collaborator Paulo Teles Yonami, including House 137 and AllGeek.