 He attended the University of Southampton and the London City and Guilds Institute as an engineer.Specializing in the application of electronics to aviation, Cavadias began his career at TAE Greek National Airlines in 1946 as a radio engineer before becoming a ground radar specialist with the Royal Air Force in 1953.In 1956, he relocated to Canada, where he took a position with Montreal-based avionics company Canadian Aviation Electronics Ltd.(CAE).