After several years as a dealer in original comic book artwork during the 1980s and 1990s, Dunbier began with Wildstorm in 1995 as Special Projects Editor.

Two years later, he was named Editor-in-Chief, a title which was changed to Group Editor when Wildstorm became a part of DC Comics.

Among the many projects Dunbier edited for Wildstorm were Alan Moore's America's Best Comics line ( including Promethea, Tom Strong, The League of Extraordinary Gentlemen & Top 10), Arrowsmith and Challengers of the Unknown.

[1] He is responsible for creating IDW's award-winning[2][3] Artist's Edition line of hardcover reprint books.

[5]https://www.publishersweekly.com/pw/newsbrief/index.html?record=4833 In 2024, Dunbier left his position at IDW to start his own publishing company, Act 4.