OAS is a Small, Disadvantaged Business, Native American-owned, environmental science and engineering consulting firm based in Amarillo, TX with several offices nationwide. The privately-held services corporation was chartered in 1991 to provide a wide range of professional consulting, engineering, administration, and field services.

OAS personnel have authored design, construction, monitoring, management guidelines, and technical documents for hazardous waste compliance, assessments, treatment strategies, remediation methods, site safety, quality control of field and laboratory activities, sampling and analysis of any media, management strategies for natural resources, and habitat assessments.

Each staff member has over 25 years experience in their specialty area. We have provided a wide range of services on projects that have been efficiently and successfully completed to meet aggressive schedules to clients including the U.S. Army Corps of Engineers, Department of Interior, Bureau of Indian Affairs, Tribal and Pueblo Governments, the Department of Energy, the Department of Defense, the Department of Agriculture, Fortune 500 companies, smaller industrial operations, municipalities, state agencies, and other public entities. OAS’s accounting procedures have been approved by the Defense Contract Audit Agency

• Indian-owned Economic Enterprise
• Certified Small Disadvantaged Business Enerprise (TX & MD)