Managing Partners Managing Directors Operating Partners Senior Advisers Directors Principals Associates Retired Co-Founder
  • Joel S. Beckman
Executive Council
  • Gerald Greenwald (Chair)
    Former Chairman & CEO, United Airlines, Inc.
  • Norman R. Augustine
    Former CEO & Chairman, Lockheed Martin Corporation
  • Michael L. Eskew
    Former CEO & Chairman, United Parcel Service, Inc.
  • Douglas R. Oberhelman
    Former CEO & Executive Chairman, Caterpillar Inc.
  • Sir John Rose
    Former CEO, Rolls-Royce plc
  • Tim Solso
    Former CEO & Chairman, Cummins, Inc.
Finance & Administration
  • John Clarke
  • Scott Parkis
    Director, Information Technology
  • Anne Savit
    Manager, Finance & Administration
  • Francine Vitale
    Manager, Compliance & Administration
Executive Assistants
  • Aimee Bester
  • Peggy Conway
  • Sofia Hodza
  • Barbara Palmer

John Hamilton
Senior Adviser

Mr. Hamilton served as CEO of Electro-Motive Diesel from 2005 through 2010, Chairman of the Board of EDAC Technologies from 2015 to 2019 and Chairman of the Board of Nordco Technologies from 2014 to present. Mr. Hamilton also served as President and CEO of Veyance Technologies from 2010 until its sale by Carlyle Partners to Continental AG in 2015. Prior to his Greenbriar roles, Mr. Hamilton held senior positions at The Harbour Group, The Fairchild Corporation and Allied Signal Aerospace.
  • Education
  • Princeton University, BSE
  • University of Chicago, MBA

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