Complex sentence: After leaving E!, Mr Namer founded Steeplechase Media and Comspan Communications, Inc, he began his career as an installer in 1971 at Time Incorporated video group (Manhattan Cable TV).
Split into simpler sentences: After leaving E!, Namer founded Steeplechase Media and Comspan Communications. He began his career as an installer in 1971 at Time Incorporated video group (Manhattan Cable TV).