From 1980 to 1981, Levi served as clerk for Judge Ben C. Duniway of the United States Court of Appeals for the Ninth Circuit and from 1981 to 1982 as clerk for Supreme Court Justice Lewis F. Powell Jr..
During his tenure from 1980 to 1981, Levi held the position of clerk for Judge Ben C. Duniway on the United States Court of Appeals for the Ninth Circuit, and subsequently served as a clerk for Supreme Court Justice Lewis F. Powell Jr. from 1981 to 1982.