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About ECM


To read about ECM employee ownership, click here

ECM is a leading national provider of energy efficiency retrofit technologies.


We serve the ESCO and large corporate markets with business units dedicated to offering HVAC, lighting, water, weatherization, IT, and airflow management solutions. ECM Holding Group, Inc. is an employee-owned ESOP with headquarters in Oshkosh, WI, and operations nationwide.

If you are an ESCO, we would welcome the opportunity to show you why so many leading ESCO’s work with us nationwide.

And if you represent a large Corporation, please contact us to learn more about how our Fortune 500 Clients have partnered with ECM to deliver corporate sustainability programs.

We are a trusted partner to some of the largest energy services, industrial, commercial real-estate, technology, energy, pharmaceutical and consumer products companies in the world.


ECM Customers



  • More Scope, Quicker Payback

    Comprehensive and innovative solutions.

  • ESCO Specialty Contractor

    Our Project Managers work almost exclusively with ESCO’s.

    Because of this, we deliver effective communication, professional on-site supervision and timely project close-out.

  • Measurements & Verification

    Delivering realistic savings and a cost effective means to measure and verify them is what ECM specializes in for its innovative solutions

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