He is co-founder of the animation studio Klasky Csupo, which produced the first three years of The Simpsons, as well as episodes of Rugrats, The Wild Thornberries, Duckman, Stressed Eric, Rocket Power, As Told by Ginger, and Aaahh!!!
Before starting Klasky Csupo he emigrated to the United States in the late 1970s and began working as an animator for Hanna-Barbera on a few shows such as Casper and the Angels, Scooby and Scrappy-Doo, and The World's Greatest SuperFriends.
[5] Csupó was "asked [by Gracie Films] if they could bring in their own producer [to oversee the animation production]," but declined, stating "they wanted to tell me how to run my business.
"[5] Sharon Bernstein of the Los Angeles Times wrote that "Gracie executives had been unhappy with the producer Csupó had assigned to The Simpsons and said the company also hoped to obtain better wages and working conditions for animators at Film Roman.
I stood up for my producer (Sherry Gunther), because the only thing she did was asking Fox TV to pay for all of Gracie Films' changes after their approval of all aspects of production.
Shows, short films, and films produced include Technological Threat, Rugrats, Duckman, The Wild Thornberrys, Rocket Power, As Told by Ginger, All Grown Up!, Santo Bugito, Stressed Eric, Alexander and the Terrible, Horrible, No Good, Very Bad Day, Immigrants, Recycle Rex, The Wacky Adventures of Ronald McDonald, What's Inside Heidi's Head?, Edith Ann: A Few Pieces of the Puzzle and Aaahh!!!
He also directed three live-action films outside of Klasky Csupo: Bridge to Terabithia (2007) for Walt Disney Pictures and Walden Media, The Secret of Moonacre (2008) for Warner Bros. and Lionsgate, and the musical comedy Pappa Pia (2017) for Zene Nelkul KFT, Hungary.
His collection of Zappa albums were the only items he took with him when he emigrated from his native Hungary in the 1970s (at the time a one-party communist state under the Soviet sphere of influence).