Imahara is a graduate of the University of Southern California, with aB.S. degree in electrical engineering. For a time, he seriously considered switching majors, with the intention of becoming a screenwriter; he decided to stay on the engineering track after assisting Tomlinson Holman, a professor at the USC School of Cinematic Arts. He is in a relationship with Jennifer Newman.
After graduation, Imahara was hired as an engineer for Lucasfilm'sTHX division; he then moved to the company's visual effects division, Industrial Light and Magic (ILM), where he worked for nine years. While at ILM, he was involved in films such as The Lost World: Jurassic Park, Star Wars: Episode I: The Phantom Menace, Galaxy Quest, AI: Artificial Intelligence, Star Wars Episode II: Attack of the Clones, Terminator 3: Rise of the Machines, The Matrix Reloaded, The Matrix Revolutions, Van Helsing, and Star Wars Episode III: Revenge of the Sith.
Imahara is credited in many feature films as a model maker. In particular, he is credited for his work in updating the aging R2-D2 robots for the Star Wars prequel trilogy. As an official Artoo Technician, he makes a cameo appearance in the mockumentary R2-D2: Beneath the Dome.
Imahara joined MythBusters on the invitation of friend and occasional employer Jamie Hyneman and former ILM colleague Linda Wolkovitch, who is now an Associate Producer of MythBusters. He joined as the third member of the Build Team, replacing former MythBusters welder Scottie Chapman. His colleagues often, jokingly, refer to him as the geek of the Build Team. He often makes the robots that are needed for the show and otherwise specializes in operating the computers and electronics for the myths. On August 21, 2014, Hyneman and MythBusters co-host Adam Savage announced that Grant, along with cast members Kari Byron and Tory Belleci, would be leaving the show.
In addition to his role on MythBusters, he is known for his appearances on BattleBots, where he designed and competed with his robot Deadblow. He had a cameo appearance on Syfy's Eureka and the web series The Guild. Other well-known works include designing the circuit that creates the rhythmic oscillation of the arms of the modernEnergizer Bunny; leading Team ILM to victory in an appearance on Junkyard Mega-Wars; as well as authoring Kickin' Bot: An Illustrated Guide to Building Combat Robots (ISBN 0-7645-4113-7), considered to be a definitive reference in robot construction.
Imahara was a cast member and story writer for the short film Architects of Evil, created for the 2004 Industrial Light and Magic Backyard Film Contest. He mentors the Richmond High robotics team Biomechs #841 (Richmond Ca.) for the FIRST Robotics Competition, lending his expert guidance on how to create the right robot for the right job.Imahara was profiled in the magazine IEEE Spectrum, in an issue focusing on engineering dream jobs. The article was titled "Grant Imahara: Debunker in The Box.; he is shown in a fire resistant suit on the cover.
One of Imahara's independent projects, during early 2010, was constructing a robotic sidekick for Craig Ferguson, host of The Late Late Show. The robot, named Geoff Peterson, was unveiled on the April 5, 2010 Late Late Show episode and is controlled and voiced by comedian and voice actor Josh Robert Thompson.
Imahara was one of the players in the first episode of TableTop on the Geek & Sundry channel on YouTube on April 2, 2012 and made an appearance on the channel's show Spellslingers, hosted by Sean Plott. He made a cameo appearance on the final episode of Eureka, aired on July 16, 2012.
Imahara portrayed Mr. Sulu in the web series Star Trek Continues episodes "Pilgrim of Eternity" (2013) and "Lolani" (2014).
Imahara was interviewed on TWiT's Triangulation (Episode 121) on 25 September 2013.
Imahara is set to play Lt. Masaru on the upcoming Star Trek Renegades.
Since leaving Mythbusters, Imahara has become a spokesman for McDonald's acting as an "investigator" who answers people's burning questions on McDonald's food. He has filmed videos on the production process of Chicken McNuggets, McRib, and McDonald's french fries.
Imahara has also partnered with Mouser Electronics to kick off their "Empowering Innovation Together" campaign, where he will host several webisodes.
In 2015, he appeared in the TV movie Sharknado 3: Oh Hell No!.
Imahara is taking an active part in advising Team USA in a giant-robot battle between American company MegaBots and Japanese company Suidobashi Heavy Industry.
* Information via Wikipedia