Mark Fleming is vice-chair of WilmerHale's Appellate and Supreme Court Litigation Practice. Mr. Fleming has appeared in more than 150 appellate cases and personally presented oral argument in 36 of them, including five before the Supreme Court of the United States and 13 before the US Court of Appeals for the Federal Circuit. He has also argued before the First, Third, Eighth, Ninth, Tenth and District of Columbia Circuits and the Massachusetts Supreme Judicial Court and Appeals Court.

Mr. Fleming's prior experience includes clerkships with the Honorable David H. Souter of the Supreme Court of the United States, the Honorable Michael Boudin of the US Court of Appeals for the First Circuit, and the Honorable John C. Major of the Supreme Court of Canada. Mr. Fleming also served as an associate legal officer in the Appeals Chamber of the International Criminal Tribunal for the former Yugoslavia.