Dr. Egon Spengler, Ph.D. is a former professor of paranormal studies at the Columbia University. Upon his termination, Egon founded Ghostbusters, Inc. along with Doctors Ray Stantz and Peter Venkman. He is considered the brain behind the Ghostbusters and has designed and built nearly all of their equipment, including the Proton Pack and the Storage facility. Typically, Ray is the only other member of the Ghostbusters who has no trouble understanding Egon's technical jargon.
Egon Spengler is a fictional character appearing in the films Ghostbusters and Ghostbusters II, and in the animated television series The Real Ghostbusters and later Extreme Ghostbusters. He is a member of the Ghostbusters, and one of the three doctors of parapsychology on the team. Spengler is portrayed by Harold Ramis in the films, and voiced by Maurice LaMarche in the cartoon series.