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 improvement solutions in the government, education, healthcare, commercial, and industrial sectors. ESG also offers a full range of sustainable infrastructure solutions including waste-to-energy, distributed generation, and renewable energy. ESG has steadily expanded its geographic footprint and service offerings for 24 years. The company employs 360 people and is licensed to operate in 48 states, the U.S. Virgin Islands, and Puerto Rico. To learn more about ESG, visit www.energysystemsgroup.com.