In 1953 Goodwin began arranging and conducting more than 300 recordings for over fifty artists, which resulted in more than 100 chart successes. He scored over 70 films in a career lasting over fifty years. His most famous works included Where Eagles Dare, Battle of Britain, 633 Squadron and Frenzy.
By 1987, Goodwin had begun concentrating on live orchestrations which included his "Drake 400 Suite" in 1980 and "Armada Suite" in 1988. His "New Zealand Suite" in 1983 marked a long association with the New Zealand Symphony Orchestra, Goodwin appeared as guest conductor with many symphony orchestras at home and abroad including the Royal Philharmonic Orchestra, City of Birmingham Symphony Orchestra, Bournemouth Symphony Orchestra, Hallé Orchestra, Royal Scottish National Orchestra, Ulster Orchestra, Detroit Symphony Orchestra, New Zealand Symphony Orchestra, Singapore Symphony Orchestra, Australian Pops Orchestra, Danish Radio Orchestra and the BBC Concert Orchestra. Goodwin was guest conductor at the Royal Academy of Music's Festival of British and American Film Music in June 1996.