The illustrious career of Hartman, spanning over two and a half decades, has been marked by his multifaceted talents as a director, producer, show-runner, storyboard artist, and character designer, earning him multiple Emmy award nominations. Throughout his extensive directing portfolio, Hartman has showcased his expertise in bringing various titles to life, including the renowned Transformers Prime, Trese, ARK the animated series, My Friends Tigger and Pooh, Twilight of the Gods, Jackie Chan Adventures, and the live-action theatrical film Phantasm Ravager, to name a few.
In addition to his impressive directing credits, Hartman has also demonstrated his versatility by directing two animated music videos for the acclaimed rock musician Rob Zombie. Furthermore, he has made significant contributions to the world of film, serving as a storyboard artist for Zack Snyder's ambitious project Rebel Moon. Hartman's impressive range of skills has also led him to take on roles such as visual effects supervisor for the cult classic Bubba Ho-Tep and animator and VFX artist for the movie John Dies at the End.
Beyond his impressive television animation achievements, Hartman is a highly accomplished illustrator, having won the prestigious Spectrum Award for his exceptional artwork. His work has adorned numerous comic books, magazines, and music album covers, showcasing his remarkable skill and versatility as an artist.