Igle decided he wanted to be a professional comic book artist at the age of 14. Igle attained his first job in comics at 17, as an intern at DC Comics, while still attending the High School of Art and Design. Igle attended the School of Visual Arts. After college, he worked as a junior art director at an advertisement agency and in a marketing company. Igle’s first break as an artist was with a now-defunct publisher called Majestic Entertainment in 1993. He built his resume working for a number of small publishers for years until about 1999, when he left comics for a while to work at Sony Animation. Igle spent several months as a storyboard artist for several CGI animated series such as Max Steel and Roughnecks: Starship Troopers Chronicles. It was during his time at Sony that he received a call from editor Bobbie Chase at Marvel Comics to work on New Warriors with Jay Faerber. He has been working in comics ever since. Igle has worked in books ranging from The Narrative of the Life of Frederick Douglass, the all-ages action miniseries Race Against Time as well as fill-in issues in mainstream titles such as Green Lantern, G.I. Joe, Martian Manhunter and Supergirl. With writer Jay Faerber has done several works: a four issue run on New Warriors and an Iron Fist/Wolverine miniseries for Marvel Comics, and Venture, a short-lived creator-owned series for Image Comics. He became the regular artist of DC Comics’ ongoing Firestorm series, beginning with issue #8 (December 2004). In November 2006, DC Comics announced that Igle would be taking over as series artist of Nightwing.
Igle has worked on several projects outside of the United States including the Army of Angels graphic novel for Humanoids Publishing/DC Comics and Perry Rhodan for The Perry Rhodan company in Germany.
In December 2005, Jamal signed an exclusive contract with DC Comics, which was publicly announced on January 10, 2006. As part of the contract’s announcement, DC Editor Steve Wacker described Jamal as a “triple threat,” stating “Jamal has the best combination in an artist: he’s scary talented, super reliable, and one of the nicest guys in the business. Igle was also honored at the 40th Anniversary edition of Comic Con international: San Diego with the Inkpot Award for Achievement in Comic Art.
Igle was the artist on the Ray title that debuted in September 2011 as part of the DC’s New 52 relaunch.
On January 2, 2012, Igle announced the end of his DC Comics exclusive contract on his personal blog.