(written from a Production point of view)
Kirchoff broke into the industry in 2003, as he was completing his BFA at Savannah College of Art and Design, when he worked for Humanoids Publishing coloring Metal Hurlant. That led to work with other publishers including Image, Dark Horse, and IDW Publishing, where he worked on the Angel series before moving onto the Doctor Who series and the colorization of the Doctor Who Classic series.
In 2012 he colored Mark Buckingham's art for the B cover of "Assimilation², Issue 2". In 2019 Kirchoff colored the entirety of Star Trek: Sky's the Limit, a 16-page comic book which was as an exclusive included in the Star Trek: Picard Movie & TV Collection Blu-ray box set, downsized to fit the packaging.