After working as a director of International Programs at the
Leadership Institute, Edmondson entered the comics industry with
Olympus, a 4-issue
Image Comics mini-series illustrated by
Christian Ward. He followed up with two 5-issue mini-series, again published by Image Comics,
The Light with art by
Brett Weldele and
Who is Jake Ellis? with art by
Tonči Zonjić. Edmondson's longest work at Image was
The Activity, a series about the
United States Army Intelligence Support Activity that was born out of his love for the TV series
The Unit, the
Mission: Impossible film series and military films like
Black Hawk Down, as well as the
Call of Duty: Modern Warfare video game series. While researching and writing the series, Edmondson consulted with various military personnel. As part of
DC Comics' 2011 initiative
The New 52, Edmondson scripted
Grifter, introducing the eponymous
Wildstorm character into the
DC Universe. In 2012, he penned the 4-issue
Iron Man series for
Marvel's
Ultimate Comics imprint, following up with
main continuity runs on
The Punisher with his
The Activity collaborator
Mitch Gerads and
Black Widow with
Phil Noto. Edmondson's latest work at Marvel and his last work in comics to date was
Red Wolf. In 2013,
Who is Jake Ellis? was optioned by
20th Century Fox as a project for director
David Yates, with
Seth Lochhead set to pen the script. In August 2016,
Josh Mond was announced as the new director for the adaptation. In 2015,
Paramount Pictures optioned
The Activity with
Ken Nolan, the writer of
Black Hawk Down, attached as the screenwriter. That same year, Edmondson appeared in an acting role in season 5 episode 14 of the TV series
Rizzoli & Isles. In 2016,
Variety announced that Edmondson was scripting a pilot for the
Gold Standard Media series
Prodigal. In 2017, Edmondson co-founded Eco Defense Group, a
501(c)(3) organization that focuses on
counter-poaching and
wildlife conservation in southern Africa. ==Personal life==