Ameresco, Inc.

Ameresco, Inc. is a leading cleantech integrator and energy infrastructure solutions provider, dedicated to helping customers reduce costs, enhance resilience, and achieve Net Zero decarbonization in the global energy transition. Founded in 2000 by George Sakellaris, the company's mission is to be a trusted full-service energy partner delivering resilient, responsible, and innovative solutions, with a vision to energize a sustainable world. Ameresco's corporate headquarters are located in Framingham, Massachusetts.

The company offers a comprehensive portfolio of services, including implementing smart energy efficiency solutions, upgrading aging infrastructure, and developing, constructing, and operating distributed energy resources. These solutions encompass a wide range of technologies such as solar, wind, geothermal, biomass, biogas, renewable natural gas (RNG), battery energy storage systems (BESS), and microgrids. Ameresco leverages budget-neutral financial solutions like Energy Savings Performance Contracts (ESPCs), Power Purchase Agreements (PPAs), and Energy as a Service (EaaS) to serve a diverse client base, including federal, state, and local governments, utilities, data centers, educational and healthcare institutions, housing authorities, and commercial and industrial customers across North America and Europe.

As of April 1, 2026, George Sakellaris continues to serve as CEO and Chairman of the Board, with Nicole Bulgarino and Lou Maltezos appointed as Co-Presidents, and Peter Christakis as Chief Operating Officer, reflecting strategic organizational changes to drive growth. Recent notable activities include partnering with Montgomery County Public Schools for solar energy and releasing its 2025 Impact Report in April 2026, as well as being awarded an 83 MW solar project in Kozani, Greece. Ameresco maintains a strong market position as a leading cleantech integrator, having been ranked as a U.S. ESCO market leader by revenue for 2020-2022, and reported robust financial performance with 2024 revenue of $1.77 billion and a significant project backlog.