 Currently, Lewin practices law together with his daughter Alyza D. Lewin, at Lewin & Lewin, LLP.Lewin & Lewin, LLP specializes in white-collar criminal defense and in federal appellate litigation, and is located in Washington, D. C.

Lewin has written numerous articles on American jurisprudence, politics, and religion.He was an author and Contributing Editor to "The New Republic" between 1970 and 1991.