Skip to content

Seven Companies Earn Industry-Leading Accreditation from the National Association of Energy Service Companies

The re-accreditation of Energy Service Companies and Energy Service Providers from the 2023 spring applications highlights their exceptional adherence to professional, technical, and ethical standards.

WASHINGTON, DC., July 9, 2023 - The National Association of Energy Service Companies (NAESCO), the leading advocacy and accreditation association representing companies modernizing our nation’s building infrastructure through energy efficiency projects, announces the re-accreditation of seven companies. These companies have demonstrated the highest levels of professionalism, technical expertise, and ethical standards, making them exemplary partners for building infrastructure and energy efficiency projects.

NAESCO's rigorous accreditation process involves a comprehensive evaluation of a company's technical and managerial competencies. Three categories of accreditation are offered, Energy Service Company (ESCO), Energy Service Provider (ESP), and Energy Efficiency Contractor (EEC).

Each applicant undergoes a meticulous examination by an impartial committee of industry experts, ensuring a thorough assessment of their core competencies and business practices. Following the spring 2023 application review, seven companies have successfully achieved re-accreditation.

Energy Service Providers:

  • Ameresco
  • Energy Systems Group

Energy Service Companies:

  • Brewer-Garrett
  • CEG Solutions LLC
  • McClure Company
  • Performance Services

NAESCO-accredited companies play a vital role in revitalizing aging infrastructure, building resilient energy systems, and driving down energy consumption.

Accreditation opportunities are available twice a year, in the spring and fall. NAESCO membership is a prerequisite for accreditation eligibility.

For more information about NAESCO and its accreditation process, please visit

See a full list of NAESCO-accredited companies:



The National Association of Energy Service Companies (NAESCO) is the leading advocacy and accreditation organization for Energy Service Companies (ESCOs) and is dedicated to modernizing America’s building infrastructure through performance contracting. Uniting the energy service industry, NAESCO promotes favorable government policies; sponsors a rigorous accreditation program; provides training and education; and champions the interests of ESCOs across the nation.

ESCOs contract with private and public sector energy users to provide cost-effective energy efficiency retrofits across a wide spectrum of client facilities, from college campuses to water treatment plants. Effectively utilizing a performance-based contract business model, ESCOs have implemented more than $70 billion in comprehensive energy efficiency retrofit projects over the last three decades.

Learn more about NAESCO, its members, membership benefits and accreditation process at, and follow NAESCO on Twitter (@NaescoNews) and LinkedIn (@naesco).


Media Contact:

Julie Chesna