Optima has successfully worked with the following companies and organizations:

  • Alaska Department of Transportation
  • Arizona Department of Transportation
  • British Gas Corporation
  • California Department of Transportation
  • Central Hudson Gas and Electric Corporation
  • City of Beijing
  • City of Detroit
  • City San Francisco
  • Con Edison of New York
  • Dominion (Ohio)
  • Dominion (Pennsylvania)
  • Federal Highway Administration
  • The Gas Research Institute
  • The Gas Technology Institute
  • Kansas Department of Transportation
  • KeySpan Energy Corporation
  • Long Island Lighting Company
  • Ministry of Communications, Saudi Arabia
  • Ministry of Public Works, Portugal
  • Minnesota Department of Transportation
  • New Jersey Natural Gas
  • Niagara Mohawk Corporation
  • North Carolina Department of Transportation
  • Oklahoma Natural Gas
  • ONEOK Corporation
  • Pacific Gas and Electric Corporation
  • Public Service Electrical and Gas
  • Road Directorate of Portugal
  • Rochester Gas and Electric Corporation
  • San Diego Gas and Electric
  • San Francisco International Airport
  • Transportation Research Board of the National Academies
  • U.S. Department of Energy
  • Urban Institute
  • Vermont Department of Transportation
  • Washington Department of Transportation
  • The World Bank