Energy Systems Group was created in April 1994. Since 1998, ESG has been accredited by the National Association of Energy Services Companies (NAESCO). In 2003, ESG was one of the first Energy Services Companies to earn the prestigious Energy Service Provider (ESP) accreditation. This accreditation is reserved for only the highest performing and professional companies in the energy services industry.

Energy Systems Group was built around 4 cornerstone principles: client satisfaction, employee development, sustained profit, and steady growth. Along with the trusted partnerships we have developed with our clients, ESG prides itself on hiring and developing talented and creative people. Because we support and grow with our employees, our customers and our company receive a greater value in service, quality, creativity, and partnership. Our teams innovation and passion for service shines through on each project which, in turn, improves our customers businesses in ways that initially seem impossible. We have earned several national awards in performance, design, and innovation.

ESG has grown from our single office in Evansville, Indiana to thirteen office locations, three energy centers, two operations & maintenance centers, and four energy conservation program centers to serve our customers throughout the Midwest, Mid-Atlantic and Southeast United States. Leveraging these regional locations with trusted local vendors enables ESG to provide responsiveness unrivaled in meeting our customers needs.