Professional Expertise

Mark S. Weiss joined Cushman & Wakefield as an executive vice chairman in January 2016, having established himself as a leading commercial broker/advisor/tactician within the real estate industry. His range of experience and expertise includes successfully completing some of New York City’s most noteworthy and complex transactions in leasing, sales and development.

With 33 years of experience in commercial real estate, Weiss has completed more than 1,600 transactions constituting a broad range of sizes, scope, and innovation. Prior to joining Cushman & Wakefield, Weiss worked at Olympia and York, the Edward S. Gordon Company, Studley, and most recently, Newmark Knight Frank. Weiss is also a published author, having written an acclaimed book on the impact of breast cancer on the spouse of a breast cancer patient. He lives in Manhattan with his wife and three children.

Select Clients Served and Noteworthy Transactions

  • Cornell University, Columbia University, Hunter College, Memorial Sloan-Kettering Cancer Center, the Spence School, the Windward School, Doctors Without Borders, Hospital for Special Surgery, New York Society for the Prevention of Cruelty to Children, Catholic Charities, Children’s Aid Society, New York Proton Center—partnership between Mt. Sinai Hospital, ProHealth, MSKCC, and Montefiore Hospital—190,000 SF (Largest commercial transaction executed in Harlem)
  • EisnerAmper, the Blackstone Group, Owl Rock Capital, Group Clarins, AppNexus
  • Cleary Gottlieb, Hogan Lovells, Osler, Fitzpatrick Cella Harper and Scinto, Duane Morris, Kasowitz Benson, Hughes Hubbard & Reed, Mintz, Levin, Jackson Lewis, Fox Rothschild, Ropes & Gray
  • SEIU 32-BJ, Local 79, Doctors Without Borders

Professional Affiliations

  • Commercial Board of Directors of the Real Estate Board of New York (REBNY)
  • Chairman of the Board of Directors of the Achilles Track Club (Achilles International)
  • Board of Directors of the New York Society for the Prevention of Cruelty to Children

Professional Recognition

  • REBNY’s New York’s “Most Ingenious Deal of the Year” award for 2005, 2010, and 2015
  • Long Island’s “Most Ingenious Deal of the Year” award for 2006, 2015
  • New Jersey’s “Most Ingenious Deal of the Year” 2015


  • Graduate of the David Rockefeller Fellows, Class of 2005
  • Syracuse University, SI Newhouse School of Public Communications, Class of 1984