Meet our Leaders Circle Zero Energy Firms


Leaders Circle firms in the Zero Energy Leaders category have proven their passion, knowledge, and innovation for designing zero energy (ZE) buildings–those that produce as much energy as they consume through renewable resources.

Firms in this category have at least one verified project in NBI’s Getting to Zero Buildings Database. Verification involves NBI’s independent review of 12-months of energy use and renewable production data confirming an energy use intensity (EUI) of “0” or less.



Click on any of our Leaders Circle firms below to learn more about their work:






Perkins Eastman is a global architecture firm that has grown to include over 1,000 employees working out of a combined 17 interdisciplinary offices around the world. From education and healthcare to mixed-use and transit-oriented developments, Perkins Eastman designs for a sustainable and resilient future, and to enhance the human experience through the built environment.

The firm’s practice is founded on the idea that design can have a direct and positive impact on people’s lives. This is achieved through research and innovation, always questioning the status quo and tireless effort to understand our clients’ missions and operations. By focusing on the user experience and drawing on the firm’s vast roster of design and thought leaders, Perkins Eastman is uniquely equip to tackle the most complex design challenges, no matter how large or small.

Tobin Montessori School and Vassal Lane Upper School, Cambridge, MA  |  Designed by: Perkins Eastman  |  Image rendering: Perkins Eastman

Notable Projects:

  • Tobin Montessori School and Vassal Lane Upper School




CMTA is a national engineering firm with 400+ employees and 15 offices across the US. CMTA has been a pioneer in engineering zero energy buildings for decades, and understands how difficult changing paradigms can be. They are true partners who are vested in the long-term success of their buildings, which is measured by exceeding the expectations of building owners and managers and maintaining the health and comfort of the occupants. CMTA has leveraged their expertise in high performance, energy-efficient design into a nationwide practice that includes Consulting Engineering, Performance Contracting and Zero Energy Design, Technology Solutions, and Commissioning Services. They are Data Driven, Results Proven. CMTA has collected over two decades of actual utility data on their projects to continually improve their approach. This database and their years of high-performance design experience mean they understand how to make these buildings a reality without extra first costs.

Cincinnati District 3 Police Headquarters, Cincinnati, OH  |  Designed by: Emersion Design  |  Photo by: Dish Design, LLC

Notable Projects:

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