Mark represents some of the largest financial institutions and Fortune 500 companies in varied industries in complex civil litigation (including MDL and class action cases), criminal matters, internal investigations, and corporate integrity matters. He has extensive experience in court and advising boards of directors. Mark is also a member of the Kirkland Executive Management Committee.

Served as Deputy U.S. Attorney General (No. 2 position at the U.S. Justice Department) and as a U.S. District Judge in Chicago. Unanimously confirmed by the U.S. Senate for both positions. Served as a law clerk to Justice Antonin Scalia, U.S. Supreme Court (1993-1994).

Fellow, American College of Trial Lawyers.

Harvard Law School, J.D., magna cum laude, 1992;

University of Oxford, M.A. in Law, Marshall Scholarship, First Class Honors, 1990;

University of Illinois, B.A.s in Economics and History, summa cum laude, 1988.