Gary Mandel

Simpson Thacher & Bartlett LLP

$ $$$

Lexington Avenue 425
New York 10017 NY US

Gary B. Mandel is a Partner in the Firm’s Tax Department.  His areas of concentration are federal income tax with a particular emphasis on corporate mergers and acquisitions, joint ventures, restructurings and spin-offs. Gary advises on tax matters for, among others, several of the Firm’s private equity fund clients.  He also has advised on multiple acquisitions for financial institutions.

Gary has been consistently recognized as a leading tax lawyer by Chambers USA: America’s Leading Lawyers for Business. Clients have described him as “an impressive tax lawyer, in terms of technical knowledge and real-world experience, and very creative in thinking about solutions to complex problems,” and noted that “[h]e knows lots about the market and gets to the point with practical advice very quickly.

Gary joined Simpson Thacher in 1997 as an Associate and became Partner in 2003. He received his B.S. in 1985 from Brooklyn College, his M.B.A. in 1990 from Pace University and his J.D., cum laude, in 1994 from Saint John’s School of Law. Gary earned an LL.M. with distinction in 1996 from Georgetown University School of Law. Gary is also a certified public accountant.

He was a law clerk to the Hon. Carolyn Miller Parr (U.S. Tax Court) from 1994 to 1996. He is a member of the Executive Committee of the Tax Section of the New York State Bar Association. He is also a member of the Association of the Bar of the City of New York and of the New York and American Bar Associations. He is admitted to practice in New York, New Jersey and the U.S. Tax Court. Gary is an adjunct professor at Columbia Law School teaching in the J.D. program and at New York Law School, teaching in the LL.M. program.


  • Georgetown University Law Center, 1996 LL.M.
    • with distinction
  • St. John’s University School of Law, 1994 J.D.
    • cum laude
  • Pace University, 1990 M.B.A.
  • Brooklyn College of the City University of New York, 1985 B.S.


  • Association of the Bar of the City of New York
  • New York State Bar Association, Member, Tax Section; Executive Committee (2001–Present); Committee on Pass-Through Entities (2002–Present)
  • American Bar Association, Tax Section (1997–Present)


  • New Jersey 1994
  • New York 1995
  • U.S. Tax Court 1996


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Lexington Avenue 425
New York 10017 NY US
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