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 early career, Levi served as a clerk for Judge Ben C. Duniway of the Ninth Circuit Court of Appeals (1980-1981) and later as a clerk for Supreme Court Justice Lewis F. Powell Jr. (1981-1982).