Clients
GSG personnel have provided services to:
- AAG Management
- ABN AMRO
- Accenture
- Acciona Wind Power
- AIG
- Alcan Inc
- Allied Barton Security Services
- Alpha & Omega Services Inc.
- American Jewish Committee
- Amgen Inc.
- Andover Realty
- Andrews International
- Aramark Corporation
- Archer Daniels Midland
- Artus Group Investigations
- ASIS International
- ATCO Reality
- Atomic Energy Canada Limited
- Barclays Capital
- Baruch LLC
- Battery Park City Authority
- Beau Dietl & Associates
- B J's Wholesale
- Boston Scientific
- Brause Realty
- BREA Property Management
- Bromley Companies
- Brookfield Management
- Capital One
- Capital Properties
- Cardone Industries Inc.
- CB Richard Ellis
- Cerberus Security Services LLC
- Charand Associates
- CharBroil Div WC Bradley Co
- Children's Aid Society
- CNA Cornerstone
- Cooper Square Realty
- Cordis Corporation
- Corning Incorporated
- Delta Scientific
- Disney ABC
- Diversified Security Solutions
- Don Buchwald Associates
- Douglas Elliman
- Ernst & Young
- Estee Lauder
- Exxon Mobil
- FCCJ
- Federal Reserve Bank of Kansas City
- Fidelity Investments
- Footlocker Inc.
- Fox Television Stations
- G-Holdings Corp.
- Garda Consulting & Investigative Services
- GE Healthcare
- GE Transportation
- General Atlantic
- General Electric
- Gerson Lehman
- Greystone Management
- Goldman Sachs
- Government of Canada
- Grant Thornton LLP
- Gray Hawk Systems
- Grubb & Ellis
- Harris & Shriftman
- H.C. Wainwright & Company
- Helen Mills Theatre
- Hitachi Global Storage Technologies
- Honeywell
- Hospira World Wide, Columbia University
- Hudson Yards Catering
- J & C Lamb
- John Wiley & Sons
- Joseph P. Day
- JR Gettier & Associates
- Kassis Realty
- Kenyon Realty
- Knights of Columbus
- Koby Mandell Foundation
- Kroll Worldwide
- Kushner Properties
- Levy Security Corporation
- Lladro
- LCT Associates
- Lockheed Martin Corporation
- McDonald's Corporate
- Majestic Property Management Corp.
- MasterCard International
- Milliman Inc.
- Merrill Lynch
- Motorola
- Mylan Pharmaceuticals Inc.
- New 42nd Street Studios
- NYS Police
- Paramount
- Pfizer Inc.
- Phillips International
- Pratt Institute
- Protection One
- Prudential Financial
- Purdue Pharma
- Quartz Realty
- Quebec Hydro
- Ralph Lauren
- Real Estate Board of New York
- Related Management
- Rose Associates Inc.
- Rudin Management Company
- S.L. Green
- SAC Capital
- Securitas
- Siemens Ultrasound
- Solectron Corporation
- Southern Poverty Law Center
- SSC, Inc.
- State Farm Insurance
- The Government of Brunei Darussalam
- The Government of Cambodia
- The Government of Colombia
- The Government of Ecuador
- The Government of El Salvador
- The Government of Georgia
- The Government of Germany
- The Government of India
- The Government of Israel
- The Government of Macao
- The Government of Malta
- The Government of Mexico
- The Government of Peru
- The Government of Russia
- The Government of Singapore
- The Government of Thailand
- The Government of the People's Republic of China
- The Government of the territory of Hong Kong
- The Government of the United States of America
- The Government of Uzbekistan
- The Jewish Museum
- The Miami Metro-Dade SWAT team,
- The Nassau County Police Department
- The New York City Police Department, Emergency Services Unit
- The Rhode Island State Police
- The Suffolk county Police Department
- The United States Attorney's Office
- The U.S Department of State, Diplomatic Security Services Division
- The United States Marine Corps
- The US Park Police SWAT Team
- Tiffany & Co.
- Trebor Management
- Treeline Management
- US Marine Unit assigned to HMX-One, the President's Official Helicopter
- Van Andel Institute
- Virginia State Police
- Vornado Reality
- Waldman & Associates Investigations
- Walt Disney
- Westminster Management (New Puck Associates)
- William Wrigley Jr. Company
- Wisenberg & Wisenberg Law PLC
- WMC Associates
- World Security
- Worley Group
- Xerox Corporation
- Zumiez, Inc.
