Joshua Matz is an expert in constitutional law, civil rights, and presidential impeachment. He served as a law clerk to Justice Anthony Kennedy of the U.S. Supreme Court, Judge Stephen Reinhardt of the U.S. Court of Appeals for the Ninth Circuit, and Judge J. Paul Oetken of the Southern District of New York.

In 2012, Professor Matz and Professor Larry Tribe published The Constitutional Inevitability of Same-Sex Marriage, 71 MD. L. REV. 471 (2012). Two years later, they co-authored an award-winning book about the Supreme Court, Uncertain Justice: The Roberts Court and the Constitution. In May 2018, Professors Matz and Tribe published their second book together, To End a Presidency: The Power of Impeachment.