Celtic Energy Is Now NV5 - Energy Efficiency Services

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Celtic Energy Is Now NV5 – Energy Efficiency Services

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A Nationally Recognized Industry Leader in Energy & Sustainability Consulting, Providing Energy Project Management & Oversight.

Celtic Energy’s mission is to help our clients achieve their energy goals and minimize risk through our work as the nation’s most effective independent ESPC & PACE Third-Party Consultant and Sustainability Project Manager, while acting as a trusted advisor and educator on all energy-related topics.

Celtic Energy is a nationally recognized and highly respected energy consulting firm that specializes in energy project management and oversight. As one of the top Owner’s Representative firms in the country, Celtic Energy has performed oversight on over $2 billion in energy projects in 35 states, Washington, D.C. and abroad. Our talented and experienced team of advisors has served as Project Facilitators on Federal Energy Projects and as a 3rd Party Owner’s Representative on a multitude of State, Municipal, School, University, Medical Facility and Commercial/Industrial projects, with special expertise in the area of Energy Savings Performance Contract (ESPC) oversight.

CEI has also been selected to perform conceptual design and oversight in the burgeoning microgrid market, performing such services on the first Federal Microgrid Project for the FDA and for the City of Stamford’s government microgrid project. We were recently selected by the State of Rhode Island to design their statewide microgrid program. Recently, we have expanded into the Hospitality sector, providing energy project management and oversight services, including conceptual microgrid design, for hotel, resort, and casino clients.

CEI provides advisory consulting services to State, County and Municipal clients, PACE project development and technical review, and oversight on PACE projects. We are one of the nation’s most experienced firms in this arena, working with the highly successful Connecticut C-PACE program since its inception. CEI also conducts energy audits, reviews Power Purchase Agreements, and consults on a variety of Sustainability projects for just about every market sector.

To reduce project costs and minimize operating costs of new/remodeled facilities, CEI offers its very effective Energy-Conscious Design Review (ECDR) services to both public and private sector clients.

Locally, CEI stays connected to the New England community by providing energy auditing and advisory services to all market sectors. In Connecticut we serve as a preferred vendor for both major utilities’ Energy Use Assessment (EUA) and Business Sustainability Challenge (BSC) programs, and handle Retro-Commissioning projects as well. CEI also supports CONNStep, performing energy consulting to support their role in aiding Connecticut manufacturers.

Mission Statement

Celtic Energy’s mission is to help our clients achieve their energy goals and minimize risk through our work as the nation’s most effective independent ESPC & PACE Third-Party Consultant and Sustainability Project Manager, while acting as a trusted advisor and educator on all energy-related topics.


Celtic Energy provides our clients the answers to these and many other questions. We serve primarily as an Owner’s Representative or Third-Party Consultant to both Public and Private sector organizations seeking help from a truly independent advisor. Our highly experienced and certified staff has served as an innovative industry leader in this role throughout the U.S. for the past 15 years.

Celtic Energy helps clients conceptualize the most effective energy projects for their needs, understand and define acceptable risk levels early in project cycles, and adopt industry best-practices to enhance project success. We educate clients on industry programs and financing alternatives, and assist States in developing effective Energy Savings Performance Contract processes and effective C-PACE financed projects. We aid in vendor selection, and perform QA oversight services to verify contractor commitments are met and promised energy savings are realized. Throughout all this, we serve our clients’ interests and do not promote any company’s products or services. We remain at all times vendor neutral, technology agnostic, and fiercely independent!

Celtic Energy offers energy solutions for a wide range of clients throughout the United States and the Caribbean.

Celtic Energy provides a full range of services to help our clients profitably reduce energy consumption and mitigate the environmental impact of doing business.

To explore how Celtic Energy can help drive your energy costs down, help reduce your carbon footprint, and manage your energy projects, please contact: Walt Donzila, C.E.M., C.P.C. Director of Business Development 860-882-1515 email
Celtic Energy – Corporate Headquarters Glastonbury, CT 437 Naubuc Ave. Suite 106 Glastonbury, CT 06033 860.882.1515
Celtic Energy – Current Regional Locations Metro New York City
Reno, NV 507 Silversmith Pl, Reno NV 89511

Maryland 1027 Omar Drive, Crownsville MD 21032

Celtic occasionally establishes regional offices on an as-needed basis, depending on project workload in the geographic area, e.g., Las Vegas, NV. We have served clients in 25 states plus the District of Columbia from our locations, and are open to establishing regional offices where expansion of work requires them.



Topobathy Lidar - Technically Speaking

Our internal innovation and development team constantly analyzes new technology and develops solutions to meet our client’s challenges. Our Technically Speaking series is one way we share our technical findings with the professional community. 

Please tell us a little about yourself by filling out the form below, and we’ll share the document with you, thanks!

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