Complex sentence: In 1975, Woolfson joined forces with record producer Alan Parsons who was a recording engineer on many Beatles and Paul McCartney albums as well as having engineered Pink Floyd's "The Dark Side of the Moon".
Split into simpler sentences: In 1975, Woolfson joined forces with record producer Alan Parsons. He was a recording engineer on many Beatles and Paul McCartney albums as well as having engineered Pink Floyd's "The Dark Side of the Moon".