Complex sentence: Landee then worked at Sunwest Studios as an engineer in 1968, where he later became manager before moving on to Warner Bros. Records' Amigo Studios under Lee Herschberg and it was at Amigo that he gained a large number of music industry contacts.
Split into simpler sentences: Landee then worked at Sunwest Studios as an engineer in 1968, where he later became manager before moving on to Amigo Studios under Lee Herschberg. It was at Amigo that he gained a large number of music industry contacts.