Jeff Brennan brings years of experience working for notable comics publishers,

including DC comics, Heroic Comics, Bongo Comics, and Heavy Metal Magazine,

 and as a storyboard artist on animated shows like “Jumanji”,

 “Dragon Tales”, “Courage the Cowardly Dog”, “Extreme Ghostbusters” 

and “Magma Corps”.

He started working in comics in 1991 as an assistant to Brett Breeding as a background inker on "Superman". This led to a brief stint working in the DC comics bullpen, and an inking assignment on a "Deathstroke the Terminator" annual.

He worked as an animator on the short film "Chicken From Outer Space". This served as a pilot for the Cartoon Network series Courage the Cowardly Dog. He came back to work on Courage as a storyboard revision artist and prop designer when the show became a series. He also was an animator on the opening titles of The RosieO'Donnell Show, The Nanny starring Fran Drescher, as well as commercials for Spider-man pasta, and X-men toys

His comic book work includes "Bart Simpson comics",  He has done visual effects compositing on the film "The Expendables".

His work has been featured on the hit show "The Big Bang Theory" and in "Heavy Metal magazine".