Mark L. Wolf was appointed to the United States District Court for the District of Massachusetts in 1985, served as its Chief Judge from 2006 through 2012, and is now a Senior Judge. He has previously served as a member of the Judicial Conference of the United States and Chair of the Committee of District Judges on the Judicial Conference, and on the Judicial Conference Committees on Criminal Law, the Federal Rules of Criminal Procedure, and Codes of Conduct.

Judge Wolf also previously served in the Department of Justice as a Special Assistant to the Deputy Attorney General of the United States (1974) and the Attorney General of the United States (1975-1977), and as Deputy United States Attorney for the District of Massachusetts and Chief of the Public Corruption unit in that office (1981-1985). He was also in private practice in Washington, D.C. (1971-1974) and in Boston (1977-1981).

Among other honors, Judge Wolf received a Certificate of Appreciation from President Gerald Ford for his work in the resettlement of Indochinese refugees (1976), the Attorney General's Distinguished Service Award (1984), an honorary degree from Boston Latin School (1990), the Boston Bar Association's Citation for Judicial Excellence (2002 and 2007), and similar citations from the Boston Chapter of the Federal Bar Association (2009), and the Massachusetts Bar Association (2012). He is also the Chairman Emeritus of the Albert Schweitzer Fellowship, the past Chair of the Judge David S. Nelson Fellowship, and the Chair of the John William Ward Public Service Fellowship.

Judge Wolf has taught courses on the role of the judge in American democracy at the Harvard, Boston College, New England and University of California - Irvine Law Schools. He has also spoken on this subject, combating corruption, and human rights issues in Russia, China, Turkey, the Czech Republic, Slovakia, Romania, Hungary, Egypt, and Cyprus.

Judge Wolf is a graduate of Yale College and the Harvard Law School.