Prism Engineering first opened its doors in 1990–back in the days before the terms LEED buildings, carbon taxes, global warming and cleantech investments were part of the energy management lexicon. From the very beginning of our journey, we focused on saving our clients energy, finding ways to improve efficiency in their buildings and operations, and changing the “energy use culture” within their organizations. Three decades later, with the growing urgency to address climate change, our work of helping organizations lead the way to a more sustainable future has never been more relevant or important.

The case studies or projects contained in this website highlight some of Prism’s achievements over our company’s history. Each piece helps tell the story of a consulting firm focused on finding the right solutions to their clients’ challenges and following through to achieve desired results.

The clients featured are only a sampling of the organizations and businesses with whom we have forged mutually beneficial relationships. Whether the partnership has lasted 30 years or 3 months, we are very grateful to all our clients who have entrusted their energy management, mechanical, electrical, and sustainability consulting needs to us. To every organization we have had the pleasure to serve, we would like to say “thank you” and that we are proud to have played our part in “saving you energy.” We look forward to continuing to work together.

“For me, one of the most personally satisfying aspects of working in the energy management sector is looking back on projects and seeing the quantifiable impact we have had on our clients’ organizations and on the environment. Equally rewarding has been hearing the feedback we receive from clients, who share with us their new-found passion and excitement for energy management. In those moments, it becomes very clear that we do make a difference; that we are part of the solution.”
Robert Greenwald, Principal and President

If all our recommendations were implemented, each year our clients would save:

kilowatt hours of electricity


gigajoules of fuel


tons of carbon dioxide kept out of the atmosphere


dollars in energy costs avoided


trees planted


fewer cars on the road

Who We Are

We are a consulting firm focused on saving energy. From design to implementation, we provide energy management, electrical and mechanical engineering, utility monitoring and sustainability consulting to help our clients create a greener, more energy efficient world.

Our Vision

BC’s leader in helping organizations save energy.

Our Mission

Our team of specialists achieves our vision by working collaboratively with our clients to:

  • improve facility performance through technical innovation and building system upgrades,
  • affect operational and cultural change,
  • and monitor results for continuous improvement.

The result is energy efficient and modernized facilities, reduced environmental impact, and lower costs. We are passionate about what we do.

Our Core Values


We help create a greener, more efficient world and believe that what we do now is our legacy for future generations. Individuals and organizations have a part to play in reducing their impact on the environment by how they think about and use resources.


Our people are our most important asset. We value the members of our team and their contributions. We nurture a “family feel” in our organization by having an engaging, respectful, and supportive workplace.


We build strong customer relationships that guide our success. By better understanding our customers’ needs, we provide more effective solutions.


We provide quality and value in all our services.


We are committed to continuous improvement. We invest in our people, systems and tools to become better at everything we do. We learn from past projects to improve our services.


We act in an honest and ethical way in all our interactions.