Tim began his career working for a children's book company but also penciled scripts for Avatar Press on the side. Also early on in his career he worked for the independent publisher Dead Dog, where he drew interiors and covers for some of their books, including Hellion and From Heaven to Hell. Tim has also done work for the big two, on such comics as Exiles for Marvel and Wildcats for DC.
In 2001, Seeley was hired by his friend Josh Blaylock as a staff artist for the publisher Devil's Due. He worked on several titles at DDP, including popular properties like G.I. Joe, Halloween and Forgotten Realms. As well as original works like Kore and most notably HACK/SLASH.
HACK/SLASH is Tim's best known work, having worked on the book for eight years. In 2010, Seeley took the title from DDP to Image Comics, where after an origins mini series, the title would run for 25 issues until it came to an end in mid 2013. Following the end of the regular Hack/Slash series, Seeley launched a crossover mini series Army of Darkness vs. Hack/Slash via Dynamite Entertainment, which canonically followed where Hack/Slash was left off.
Following the 150th issue of Witchblade with longtime writer Ron Marz's departure, Seeley would take over writing duties and bring Sara Pezzini to Chicago, where he'd write her for a year and a half before Marz's return to the title with issue #170.
In 2012, Seeley launched a new ongoing title at Image Comics with artist Mike Norton called Revival, a "rural noir" set in Seeley's home state of Wisconsin where in an isolated incident, the dead come back to life, but are indistinguishable from the living.
In 2013, Seeley started to work at DC once again, first writing digital-first stories for Legends of the Dark Knight and Adventures of Superman, followed by a Villains Month one-shot starring Killer Croc. In the fall of that year, it was announce that Seeley would be one of the writers, along with Scott Snyder, James Tynion IV, John Layman and Ray Fawkes launching a weekly Batman series entitled Batman: Eternal in the spring of 2014. In the summer of 2014, Seeley would launch Grayson, the post-Forever Evil adventures of Dick Grayson who has become an agent of Spyral, with co-writer Tom King and artist Mikel Janin.
Tim Seeley was born and raised in Wisconsin and would later go on to attend the University of Wisconsin-Eau Claire, where he would get a BFA in illustration.
Tim is married and lives in Chicago, IL.