OpTerra is a pioneer in advancing the sustainable energy economy, energizing opportunity and building positive impact for the communities, institutions and businesses. 40 years of practice unifying strong legacy companies, from Consumers Energy to PG&E, Bluestone, and Chevron, have allowed us to evolve with theircustomers and become a leader in energy efficiency, renewables, and infrastructure development. ENGIE Services U.S. is a national energy infrastructure and building services company that helps education, government, commercial and industrial customers.