Representative Clients
- Ameren - Illinois
- Avista - Washington
- BC Hydro - British Columbia
- Bonneville Power Administration - Pacific Northwest Region
- Boston Edison - Massachusetts
- Cascade Natural Gas - Washington and Oregon
- Columbia Gas - Pennsylvania
- Connecticut Light & Power - Connecticut
- Com Edison - Illinois
- District of Columbia Energy Office - DC
- Detroit Edison - Michigan
- Dominion Peoples Gas - Pennsylvania
- Duke Energy - North and South Carolina
- Duke Energy - Ohio and Kentucky
- Duke Indiana - Indiana
- Duquesne Light - Pennsylvania
- Equitable Gas - Pennsylvania
- Enbridge Consumers Gas - Ontario
- Energy Center of Wisconsin - Wisconsin
- First Energy Utilities of Pennsylvania (Met Edison, Penelec, Penn Power, West Penn Power) - Pennsylvania
- General Public Utilities - New Jersey
- Illinois Housing Division - Illinois
- Indiana-Michigan Power/American Electric Power - Indiana
- Indianapolis Power & Light - Indiana
- Kentucky Association for Community Action - Kentucky
- Los Angeles Department of Water & Power - California
- Joint Utilities Renewables Project - Pennsylvania
- Utah Housing Division & Utah Ratepayers Alliance (Salt Lake Community Action Program and Crossroads Urban Center)
- National Community Action Foundation (NCAF)
- Nevada Housing Division (NHD) - Nevada
- New Hampshire Public Utility Commission (NHPUC) - New Hampshire
- New York State Department of Public Service (NYSDPS) - New York
- Northwest Natural - Oregon
- Nova Scotia Utility and Review Board (NSUARB) - Nova Scotia
- NYSERDA - New York
- Ohio Partners for Affordable Energy - Ohio
- Oregon Department of Housing & Community Services - Oregon
- PacifiCorp - Oregon, Washington, Idaho, and Utah
- PECo Energy - Pennsylvania
- Pennsylvania-American Water Company - Pennsylvania
- Philadelphia Gas Works - Pennsylvania
- PPL Electric Utilities - Pennsylvania
- Public Sector Consultants - Michigan
- Puget Sound Energy - Washington
- Snohomish PUD NO. 1 - Washington
- Southern California Edison - California
- Southern California Gas - California
- Union Gas - Ontario
- Vectren Electric - Indiana
- Vectren Gas - Indiana
- Western Massachusetts Electric - Massachusetts
- U.S. Department of Energy
- U.S. Department of Health and Human Services
- Nevada Division of Welfare and Supportive Services (DWSS) - Nevada