Gillette was a member of the Sons of Champlin (he departed in 2006), fronted by Chicago vocalist and keyboardist Bill Champlin; he had also a member of Tortilla Soup, a 10 piece northern California band. He played with comedian Danny Marona, the Stevie "Keys" Roseman All Star Band, the Strokeland Superband, and Funky Loophole (Gillette's own band). He toured and recorded with The Doobie Brothers (appearing on the Doobie's "Live At Wolf Trap" DVD), Blood, Sweat & Tears, and Santana. After a 25-year absence, Gillette rejoined Tower of Power in August 2009 for touring, replacing Mike Bogart; but he left the band again after just more than a year and a half on February 14, 2011.