She previously taught at DePaul University Law School. Before teaching, she was an attorney at Baker & McKenzie. Her primary areas of interest are global and comparative ethics and attorney malpractice. Professor Lewinbuk has been published in several countries. She has served as a Fulbright Senior Specialist in the Czech Republic (Charles University) and in Mexico (Facultad Libre Derecho de Monterrey), as well as having taught courses at the International Law Institute in Washington, D.C., and the course "American Legal System & Lawyering Skills" in Moscow, Russia and Istanbul, Turkey.