| A-TEC Energy | 2011 |
| ARCA, Inc. | 2007 |
| Center for Energy and Environment | 2004 |
| CenterPoint Energy | 2004 |
| City of Cleveland | 2015 |
| CLEAResult | 2013 |
| D+R International | 2011 |
| DNV GL | 2005 |
| Duke Energy | 2006 |
| Edison Foundation Institute for Electric Innovation | 2009 |
| Elevate Energy | 2017 |
| Energy Education Council | 2007 |
| Energy Insight, Inc. | 2015 |
| Evergreen Consulting Group | 2018 |
| Franklin Energy | 2008 |
| Geothermal Exchange Organization (GEO) | 2014 |
| Honeywell Smart Grid Solutions | 2014 |
| ICF | 2000 |
| Leidos | 2010 |
| Lime Energy | 2012 |
| Michaels Energy | 2011 |
| MidAmerican Energy Company | 2006 |
| Minnesota Energy Resources Corporation | 2007 |
| National Energy Foundation | 2015 |
| Northwest Energy Efficiency Council (NEEC) | 2008 |
| NTC | 2014 |
| Oracle Utilities | 2010 |
| Performance Systems Development (PSD) | 2018 |
| Power TakeOff, Inc. | 2017 |
| Resource Action Programs | 2012 |
| Resource Innovations | 2016 |
| SEMCO Energy Gas Company | 2014 |
| Staples Energy | 2008 |
| The National Energy Improvement Fund (NEIF) | 2015 |
| TRC | 2009 |
| Waypoint | 2017 |
