His first comic book work was a collaboration with writer Alex Grecian on Seven Sons, a graphic novel based on a Chinese folk legend. In 2007, he started work on Proof, also with Alex Grecian.[2] Later, he collaborated with writer A.J. Lieberman on Cowboy Ninja Viking (2008–2011). Despite featuring a violent action story about an assassin with multiple personalities, Disney purchased film rights to the story, assigning writers Rhett Reese and Paul Wernick to write a screenplay.[3]
In March, 2011, Rossmo's first issue of Green Wake, with writer Kurtis J. Wiebe, was released. For Green Wake Rossmo adopted a limited palette, using different colors to indicate different times or states of reality in the narrative.[4] Despite critical success, sales flagged after the second issue leading Rossmo and Wiebe to end the series early. They have since announced that they are working together again on a mini-series titled Debris to be published in July, 2012.[5]
Rebel Blood is a horror comic about an infectious disease outbreak that affects both humans and animals. Published in March, 2012, this was the first comic that credited Rossmo as a writer. Co-written with Alex Link, the remote wilderness setting in the story was influenced by Rossmo's experiences canoeing at Waskesui.[6]
Rossmo and Alex Link are collaborating again on Drumhellar (originally titled Strangeways), released by Image Comics' Shadowline, with issue 1 released in November 2013.[7]
Rossmo and writer Ales Kot are working on Wild Children, a graphic novella about students rebelling against their teachers.[8]
Dia de Los Muertos (February 2013-May 2013, with Alex Link, Christopher Long, Dirk Manning, Jeff Mariotte, Ed Brisson, Joshua Williamson, Kurtis Wiebe, Joe Keatinge and Alexander Grecian):
Dia de Lost Muertos (collects #1-3, TPB, November 2013, 128 pages, ISBN978-1-60706-807-5)
