James William Guercio (born July 18, 1945) is an American music producer, musician, songwriter, and director. He is well known for his work as the producer of Chicago's early albums as well as early recordings of The Buckinghams and Blood, Sweat & Tears. He has worked briefly in the motion picture industry as a producer and director. In the mid-1970s, Guercio managed the Beach Boys and was a member of their backing band.