Mike Mannheimer received his J.D. in 1994 from Columbia Law School, where he was a Harlan Fiske Stone Scholar all three years and served as Writing & Research Editor of the Columbia Law Review. After a brief stint as a staff attorney with the Criminal Appeals Bureau of the Legal Aid Society in New York City, he clerked for the Hon. Sidney H. Stein of the U.S. District Court for the Southern District of New York, and then for the Hon. Robert E. Cowen of the U.S. Court of Appeals for the Third Circuit.

From 1997 to 1999, he worked as a litigation associate at Paul, Weiss, Rifkind, Wharton & Garrison in New York City, where he practiced general commercial litigation and arbitration encompassing such diverse areas as antitrust, breach of contract, business torts, employment discrimination, ERISA, false advertising, product liability, and civil RICO.

For five years before joining the Chase faculty in 2004, Professor Mannheimer served as Appellate Counsel and then Senior Appellate Counsel at the Center for Appellate Litigation in New York City, where he represented indigent criminal defendants on appeal from their convictions and in related collateral proceedings. He has briefed and/or argued over forty appeals in the Appellate Division of the New York Supreme Court, the New York Court of Appeals, and the U.S. Court of Appeals for the Second Circuit. He has represented clients at every level of the state and federal judiciaries, from handling sentencing proceedings, motions, and hearings in the New York trial courts to filing cert. petitions in the U.S. Supreme Court.

Professor Mannheimer was Co-Chair of the Kentucky Death Penalty Assessment Team for the American Bar Association. He is also a prolific and eclectic scholar. He has published articles on the death penalty, coerced confessions, and the Establishment, Free Speech, Self-Incrimination, Confrontation, and Cruel and Unusual Punishments Clauses. His work on the use of the premeditation-deliberation formula to distinguish first- and second-degree murder was the winner of the 2010 AALS Criminal Justice Section Junior Scholar Paper Award. His current research focuses on the under-appreciated federalism component of the Bill of Rights.