In 1983 he founded Lerner Research (a 3D simulation development company)[citation needed] which was responsible for Chuck Yeager's Advanced Flight Trainer, Deep Space, Ultima Underworld, F-22 Interceptor, and also created the first 3D system licensed by Electronic Arts.

During this time, he led the development of more 3D simulation and entertainment software, such as Flight Unlimited, System Shock, Links Pro, John Madden Football '93, and Ultima Underworld II: Labyrinth of Worlds.

[1][2][3] The full voice functionality was spun off into a standalone product called FireTalk.

went on to work at Venture FireFighters, and Electronic Arts (as Chief Technology Officer).

worked for Sony Computer Entertainment America, Director of Tools & Technology.