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Doing Well by Doing Good

Ameresco announces first Environmental, Social
and Corporate Governance (ESG) report

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Workplace Resiliency: Promoting Health & Safety
with a Focus on Energy Optimization

Touchless controls, updated HVAC systems, automated entry/exit systems are just
a few measures that can make an immediate impact on re-opening shared spaces.

Learn About Health-Focused ECMs to Consider

Turn Old Lights Into New Savings

Experience Converting Over a Half Million LEDs

Illuminate the Possibilities with Ameresco

Concept image shows a hand planting a sprout next to five additional sprouts, each representing a later stage of growthAmeresco Celebrating 20 Years logo

Celebrating Ameresco's 20th Year in Business - A Letter
from Ameresco's President & CEO, George Sakellaris

20 Years in Sustainability

Read More

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Building Resiliency: Don't Be Left in the Dark

Why You Should Be Thinking Microgrids

When Off Is Not an Option

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A holistic approach to budget-neutral solutions
from efficiency to distributed generation, storage, and RNG

Take Action on Resiliency & Sustainability
with an Advanced Energy Portfolio

Watch this Webinar to learn more

Budget-Neutral Upgrades Are Possible

Modernize Your Facility Without Upfront Capital

Learn About Our Financing Solutions

Abstract background of blue triangles with text: Frost & Sullivan 2020 Best Practices Award Global Distributed Energy Resources Company of the Year Award

Ameresco Named Frost & Sullivan
2020 Global Best Practices
Distributed Energy Resources Company of the Year

Download Report

Read the Announcement

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Meet Carbon Neutrality Goals

With Renewable Natural Gas

Download Free White Paper

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A Community Partnership for Renewable Energy

Wastewater Becomes a Resource in Phoenix, AZ

Read the Case Study

Energy Cost Savings for Your Campus

Equipment Upgrades That Yield Results

Colleges & Universities: Start Here

Our Services

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These measures and upgrades often include lighting, water, heating, ventilation, cooling, building envelope, smart meters  and controls. We first implement efficiency gains in order to establish a strong baseline for renewable energy generation needs.

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Examples of distributed energy generation resources include Solar PV, CHP and co-gen plants, geothermal, renewable natural gas, wind – all of which can be paired with microgrid and battery storage technologies to promote resiliency and sustainability.

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We have experience in building modernization and retrofits, and work with utility distribution systems and non-energy-focused design-build new construction. We also monetize existing energy assets and take ownership and operation off the customers’ balance sheet.

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Data drives our energy analytics and supply management solutions ranging from our proprietary asset management software, AssetPlanner®, to energy procurement services for negotiating contracts and stabilizing customers’ energy budgets.

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Our holistic approach ensures end-to-end technical guidance to continued O&M of energy systems. A well-designed and properly executed O&M program is a crucial element in the equipment performance and maintenance required to realize all possible energy savings.

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Ameresco is uniquely positioned to provide financing for any opportunity – from ESPCs and PPAs to Design-Build and turnkey EaaS. We have 20 years of experience with an excellent track record of $6+ Billion in energy projects across financing models, markets, and technologies, utilizing available incentives.

Learn about how you can make your organization
Carbon Neutral with Renewable Natural Gas (RNG).
How can you add RNG to your energy portfolio?

Ameresco helps organizations meet energy saving and energy management challenges with an integrated comprehensive approach to energy efficiency and renewable energy. Leveraging budget neutral solutions, including energy savings performance contracts (ESPCs) and power purchase agreements (PPAs), we eliminate the financial barriers that traditionally hamper energy efficiency and renewable energy projects.

Drawing from decades of experience, Ameresco develops tailored energy management projects for its customers in the commercial, industrial, local, state and federal government, K-12 education, higher education, healthcare and public housing sectors.

Why us?


Technology and vendor agnostic. Find the best solution without bias.

Design Engineering Expertise

Creative solutions and innovative engineering that overcome apparent site limitations.

Comprehensive Sustainable Services

A single source for energy solutions from benchmarking to development to facility operations.

Strong Customer Relations

A partner in every aspect of design, development, performance and maintenance.

Global Presence, Local Expertise

Leverage the world’s best energy technology with project managers who know your community.

Federal and State Qualifications

Prequalification for federal and municipal contracts gets projects started sooner.

Ameresco’s Environmental Impact

In 2019, Ameresco’s renewable energy assets and customer projects delivered a carbon offset equivalent to 11,167,978 metric tons of carbon dioxide. This carbon offset is equal to one of the following:

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miles driven by an average passenger vehicle (GhG emission equivalency)

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homes’ energy use for one year
(carbon dioxide emission equivalency)


acres of U.S. forests in one year
(carbon sequestration equivalency)

Awards & Accolades

Forbes 2021 America's Best Mid-Size Companies Logo
S&P Global Energy Awards 2020 Finalist Logo
2020 Environment + Energy Leader 100 logo
10th Annual Best in Biz Awards 2020 Winner logo
Frost & Sullivan 2020 Best Practices Award Global Distributed Energy Company of the Year Award badge
BBJ Presents Boston Business Journal 2020 Middle Market Leaders logo
2020 Top Solar Contractors logo
2020 Smart Energy Decisions Innovation Awards 2020 logo
Environment + Energy LEADER Top Project 2020 badge
American City & County's 2019 Crown Communities logo