Airgas
Aramark
BAE Systems (USA & UK)
Bank of NY Mellon Financial
  -Eagle Investments
Bayer Healthcare
BGC Partners
Citigroup (USA & UK)
  -Corporate Markets & Banking
  -Banamex
  -Citicards
CNA Insurance
  -CNA Surety
Comerica
Comverse Technology
Con Edison of New York
Discover Financial Services
Exelon Energy
Fidelity Funds
General Electric (USA, UK, Sweden, Norway)
George Washington University
  -School of Engineering & Applied Science
Roche Pharmaceuticals
HSBC
Intuitive Surgical
JPMorganChase
Lockheed Martin
  -Maritime Systems
  -Information Technology

Marriott International
Merck
MetLife
Mitsui Bank
Pfizer (USA & UK)
Project Management Institute (PMI)
Prudential Financial
Public Service Electric & Gas (PSE&G)
Science Applications Int'l Corp. (SAIC)
Solvay Pharmaceuticals Group
Sunrise Medical Systems 
Telcordia Technologies
Texas Instruments
Thomson Healthcare 
UBS
UNISYS
United Technologies Corporation
  -Carrier
  -Hamilton Sundstrand
  -Hydrogen Source
  -Otis Elevator
  -Pratt & Whitney
US Department of Defense (DoD)
US Department of Energy (DoE)
  -Brookhaven National Laboratories
US Department of Homeland Security
Weatherford

• Additional clients not listed