Complex sentence: He worked later in factories and insurance, but in 1956 moved to Los Angeles where he immediately was accepted by jazz musicians such as Georgie Auld and Jimmie Rowles, who later recommended him to Woody Herman.
Split into simpler sentences: He worked later in factories and insurance, but in 1956 moved to Los Angeles where he immediately was accepted by several well-known jazz musicians. Among these musicians were Georgie Auld and Jimmie Rowles, who later recommended him to Woody Herman.