Robert L. Lieff (born September 29, 1936) is a plaintiff's lawyer and the founder of Lieff Cabraser in San Francisco, New York City, and Nashville.
He first worked as an attorney at Chadbourne & Parke, LLP in New York.
After leaving the Belli Firm, he was the founder of Lieff Cabraser.
Under his direction, Lieff Cabraser became one of the largest plaintiffs' firms in the world, with 150 lawyers and 200 employees in San Francisco, New York City, and Nashville.
Lieff Cabraser was recognized by the National Law Journal as one of the top plaintiffs firms in the country for fourteen years running, one of only two such firms to be so honored.