Mark Stein is a Partner at Simpson Thacher & Bartlett LLP in the Firm's Litigation Department. 

Mr. Stein has represented companies and individuals involved in investigations conducted by the United States Department of Justice, U.S. Attorney’s Offices around the country, the New York State Attorney General’s Office, the United States Securities and Exchange Commission, and other federal, state and self-regulatory bodies.  He has also conducted numerous internal investigations for companies confronting potential misconduct by its officers and employees.  He has reviewed the compliance programs and policies of many companies and made recommendations for improvement.  As a member of the Criminal Justice Act panel, Mr. Stein has extensive trial experience as defense counsel in federal criminal cases and has achieved a high percentage of acquittals over the past few years.  He also handles a broad range of civil litigation, including cases that are parallel to governmental investigations.

From 1989 through 1994, Mr. Stein served as an Assistant United States Attorney in the Southern District of New York, ending his tenure there as Deputy Chief of the Criminal Division.   During his tenure in government, Mr. Stein was involved in investigating, prosecuting cases, trying numerous cases of securities fraud, bank fraud and money laundering and was lead counsel in seventeen jury trials. 

In 1994, Mr. Stein served as an Assistant in the Office of the Independent Counsel for the Whitewater investigation involving allegations concerning the Madison Guaranty Savings & Loan in Arkansas and members of the Clinton administration.  

Mr. Stein is a fellow of the American College of Trial Lawyers.  He is listed in Chambers USA as a leading practitioner in the area of white collar crime and government investigations.  Mr. Stein is a frequent panel speaker on issues concerning Governmental and internal investigations. 

Mr. Stein is admitted to the bar in New York and to practice before the United States District Courts for the Southern and Eastern Districts of New York and the United States Court of Appeals for the Second Circuit.  He received his JD in 1983 from the University of Michigan Law School, where he was Senior Editor of the Law Review, and his BA in 1980 from the State University of New York at Albany.

Honors/Associations

•	Co-chair of the United Jewish Appeal, Lawyers Division, Criminal Law Committee, 2006-present
•	The Association of the Bar of the City of New York, Member, Judiciary Committee, 2001-2004
•	Member, Criminal Justice Act Panel, 1996-Present
•	The Association of the Bar of the City of New York, Criminal Law Committee, 2005-present

Speaking Engagements

•	Simpson Thacher Attorneys Speak at Directors Roundtable April 18, 2008
•	Joseph McLaughlin Chairs Complex Class Actions Conference; David Ichel, Mark Stein and Blake Bell Speak October 9, 2007
•	Bruce Angiolillo Co-Chairs PLI's "Securities Litigation & Enforcement Institute"; Mark Stein Speaks August 20, 2007

Education

•	The University of Michigan Law School, 1983 J.D. Senior Editor, Michigan Law Review,1982-1983
•	State University of New York at Albany, 1980 B.A.