As part of DC Comics’ The New 52 relaunch in 2011, Krul wrote Green Arrow and Captain Atom. He left Green Arrow after issue #3 due to time pressures but continued to write Captain Atom.

J.T. Krul’s first comic book work was at Marvel Comics, writing X-Men Unlimited and later, Spider-Man Unlimited. He subsequently went to work for Michael Turner’s company, Aspen MLT, writing their flagship titles Fathom and Soulfire. He then launched a creator-owned comic book there called Mindfield, which debuted in 2010.

Other books he has written for DC Comics include several issues of Teen Titans and Titans, including Blackest Night: Titans, the tie in to DC’s 2009–2010 “Blackest Night” crossover storyline. In 2009 Krul wrote Justice League: The Rise and Fall, and Justice League: The Rise of Arsenal and later took over the Green Arrow series with issue #31 (May 2010), with a storyline titled “The Fall of Green Arrow”. After four issues a new volume of Green Arrow was launched with a new #1 with Krul writing. He returned to Teen Titans as the main writer.

In 2008 Krul wrote Past Experience, a Heroes comic book story starring characters from the NBC TV series of the same name. That same year, he wrote the third book in the Joker’s Asylum series of one-shots, which featured Poison Ivy.

Krul moved to Los Angeles in 1996, where he landed the job of production assistant on the TV show Seinfeld. He was promoted to the position of the show’s production coordinator in its last season.

J. T. Krul (born November 14, 1972 in Michigan) is an American comic book writer, best known for his work on Aspen MLT’s Fathom comic series.