Energy Systems Group





Energy Systems Group (ESG), a wholly owned subsidiary of Vectren Corporation (NYSE: VVC), is a leading energy services provider that specializes in energy efficiency, sustainability, and infrastructure modernization solutions in the government, education, healthcare, commercial, and industrial sectors. ESG offers a full range of sustainable infrastructure solutions including waste-to-energy, distributed generation, and renewable energy. ESG is an industry leader in developing and implementing projects under Utility Energy Services Contracts and through public/private partnerships such as Enhanced Use Leases.


Energy Systems Group - Corporate Office

Energy Systems Group - Corporate Office

At Energy Systems Group, energy efficiency, modernized infrastructure, clean energy, improved learning environments, and smart financial planning are not only the outcomes of the solutions we provide; they serve as the foundation of our strategic vision and goals. Since 1994, the development of long-lasting and trusting relationships continues to be the foundation of our business. ESG has developed over $2.5 Billion in innovative energy efficiency and infrastructure improvements for over 370 customers.


Accredited by the National Association of Energy Service Companies (NAESCO) as an energy services provider, ESG's comprehensive solutions include facility-wide audits, engineering and design services, construction and project management, operations and maintenance, and measurement and verification of savings.



Leading Industry Knowledge, Affiliations and Awards

Our team is well-versed and actively engaged in energy and state legislation impacting performance contracting and public-sector financing. ESG is a leading partner, sponsor, member and qualified ESCO with key energy industry organizations, including the U.S. Green Building Council, the U.S. Department of Energy, the American College and University Presidents' Climate Commitment , the Association for the Advancement of Sustainability in Higher Education, the American Biogas Council, the Landfill Methane Outreach Program, the Energy Services Coalition and many more.


In addition, Energy Systems Group has executed an agreement with the Clinton Climate Initiative (CCI) that affirms our commitment to abide by the terms and conditions in contracts with CCI clients.


Our projects and customers have earned several awards and certifications. From Leadership in Energy and Environmental Design (LEED) certifications to being recognized by the U.S. Department of Environmental Protection as Energy STAR Leaders, our innovation, performance and expertise is award-winning.


Energy Systems Group Helps Customers

  • Reduce operating costs
  • Rebuild aging infrastructure
  • Modernize their old buildings
  • Improve comfort and productivity
  • Become energy efficient
  • Lower greenhouse gas emissions
  • Reduce carbon footprints
  • Become Green