OPES, INC. is an environmental and construction firm that has served private and public sectors since its founding in 1993. OPES has successfully developed numerous projects involving subsurface investigations, groundwater monitoring programs, and remediation. Our environmental and petroleum experience enables us to develop cost-effective solutions for environmental problems and thus guarantee our customer satisfaction.We have acquired a vast experience over the past 25 years. We have in our staff experienced hydrogeologists, civil, petroleum and professional engineers to meet the needs of our customers. Some of our customers include the U.S. Department of Defense, the Department of Veterans Affairs, the Department of the Interior, the Department of Agriculture and the Department of the Army for which OPES has delivered solutions effectively and efficiently. OPES is certified by the Oklahoma Department of Transportation (ODOT) as a disadvantaged business enterprise (DBE) firm. We are also a General Service Administration (GSA) Schedule holder (SINs numbers 899-1 and 899-8). OPES operates under these NAICS codes: 541620 - Environmental Consulting Services 562910 - Environmental Remediation Services541330 - Professional Engineering Services