John Arden "Jay" Ferguson (born May 10, 1947) is an American rock and pop musician known for his work with the bands Spirit and Jo Jo Gunne, and his 1978 solo hit "Thunder Island". His later career has been as a composer of music for television programs and films. Many people know Ferguson for composing the theme song for the American version of The Office on NBC. Ferguson was born on May 10, 1947, in Burbank in the San Fernando Valley, California, to John Becker and Kathleen Jane Ferguson. He ...