| Applied Energy Group | 2019 |
| Argonne National Laboratory | 2011 |
| D+R International | 2011 |
| DNV GL | 2005 |
| Energy Insight, Inc. | 2015 |
| Energy Management Solutions, Inc. | 2019 |
| Evergreen Consulting Group | 2018 |
| Franklin Energy | 2008 |
| Honeywell Smart Grid Solutions | 2014 |
| Itron, Inc. | 2009 |
| Lime Energy | 2012 |
| NTC | 2014 |
| Pearl Certification | 2018 |
| Performance Systems Development (PSD) | 2018 |
| Power TakeOff, Inc. | 2017 |
| Resource Action Programs | 2012 |
| Resource Innovations | 2016 |
| Staples Energy | 2008 |
| The National Energy Improvement Fund (NEIF) | 2015 |
| Waypoint | 2017 |
