Lordan started his recording career with Gypsy, a progressive rockband from Minnesota, recording three albums with them from 1971 to 1973. He then joined Sly & The Family Stone. By 1974, Sly & The Family Stone released the album Small Talk. Along with violinist Sid Page, Bill Lordan was a new face in the band on that album. The original drummer for Sly & The Family Stone was Greg Errico. The drummer on the previous album Fresh was Andy Newmark. In 1975 Lordan joined Robin Trower's band debuting on the album For Earth Below. He stayed with Trower until 1981, his last recording during his stint being the B.L.T. album with Jack Bruce. He played with the Darrell Mansfield Band and the Dave Steffen Band before starting his own band, The Bill Lordan Experiment, in 2000.