In 1950, Iwerks joined the Disney company in the machine shop as a technician.
In 1954, Iwerks got a camera technician position for the film 20,000 Leagues Under the Sea, starring Kirk Douglas and Peter Lorre. He would spend the next 30 years driving film innovations for the Disney company. Notable contributions include the first 360 film techniques, 360-degree camera, and first Circle-Vision 360 film, America the Beautiful, and developing the process for creating seamless live action shots with animated backgrounds.
In 1985, after nearly 35 years at Disney, Don left to form his own company called Iwerks Entertainment.