Dr. Holmes Hummel founded Clean Energy Works to accelerate investments in the clean energy economy by bridging the clean energy divide with inclusive financing. Previously, Dr. Hummel served as the Senior Policy Advisor in the Department of Energy’s Office of Policy & International Affairs from 2009-2013. Earlier Dr. Hummel was selected by the American Association for the Advancement of Science (AAAS) to serve as a Congressional Science Fellow in 2007, working in the office of Rep. Jay Inslee, now Governor of Washington. In addition to prior work with energy innovators in the Silicon Valley, Dr. Hummel earned a doctorate degree from Stanford University for interdisciplinary research on energy technology scenarios that achieve 100% clean energy.

Academic Appointments

  • Adjunct Professor, Civil and Environmental Engineering

Honors & Awards

  • Finance for Resilience (FiRe) Award, Bloomberg New Energy Finance (2015)

Boards, Advisory Committees, Professional Organizations

  • Executive Director, Clean Energy Works (2014 - Present)

Professional Education

  • Ph.D., Stanford University, Emmett Interdisciplinary Program in Environment and Resources (2006)
  • M.S., Stanford University, Engineering (1999)
  • B.S., Stanford University, Energy Engineering (Individually Designed Major) (1999)


  • Towards an Accessible Financing Solution, Clean Energy Works, for Building Decarbonization Coalition (1/1/2020)

    Widespread participation in clean, electric home upgrades is critical to meaningfully reduce harmful building emissions, yet clean energy investments remain out of reach for many energy customers who have neither the money to afford the upgrades nor the credit necessary to borrow what they cost.

    “Towards an Accessible Financing Solution: A Policy Roadmap with Program Implementation Considerations for Tariffed On-Bill Programs in California” is a report prepared for the Building Decarbonization Coalition that outlines how policymakers can:
    - Open a more accessible and equitable path to clean energy solutions.
    - Remove barriers to accessing clean energy solutions.
    - Address embedded barriers to clean energy solutions.


    Sacramento, CA

    For More Information:

  • LIFT Solar Everywhere, Clean Energy Works, with Groundswell (10/1/2019)

    The U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) is sponsoring research on applying a proven system for tariffed on-bill investment for energy efficiency to on-site solar. Solar PAYS is a program design based on the Pay As You Save (PAYS) system that can capitalize an on-site solar installation at a site, regardless of the income, credit score, or renter status of the occupant at that location.


    Washington, D.C.

2020-21 Courses

All Publications