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Environmental Scientist

Cayuse Environmental (Cayuse) is wholly owned by the Confederated Tribes of the Umatilla Indian Reservation (CTUIR) and offers a diverse set of services to build mutually beneficial partnerships with our customers across the globe.


Environmental icon

Cayuse is committed to excellence by providing innovative and flexible solutions to Federal, State, Municipal, and Tribal Government Clients. Our core capabilities include:

Water Resources
  • Water Resource Planning & Management

  • Water Supply Development & Modeling

  • Water Supply Distribution & Treatment

  • Wastewater Treatment & Collection

Engineering and Surveying
  • Infrastructure & Civil Site Design

  • Surveying & Mapping

  • Transportation Design & Construction

  • Unmanned Systems & Remote Sensing

Environmental Compliance Management
  • NEPA

  • Environmental Assessments

  • Natural Resources

​Environmental Investigations & Remediation
  • CERCLA and State Program Investigations

  • Environmental Remediation Feasibility Studies

  • Remedial System Design, Installation, Operation & Maintenance

  • Long-Term Monitoring and Optimization

Air Quality, Compliance & Greenhouse Gas Management
  • Air Permitting

  • Compliance and Auditing

  • Fenceline Monitoring

  • Greenhouse Gas Management

  • Leak Detection and Repair

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What We Do

Cayuse Environmental, LLC can offer a wide spectrum of environmental and engineering services to our clients requiring engineering infrastructure, environmental remediation, environmental conservation, environmental compliance, pollution prevention and environmental operations and maintenance services. Cayuse brings these services to our clients providing efficiencies, cost savings and consistent quality.

Native American teepee

Past Performance

Operational Environmental Services – Active Range
Cayuse manages operations at one of the nation’s busiest U.S. Air Force primary training ranges, skillfully and cost-effectively providing highly-varied and consistently exceptional services in UXO removal / characterization, target maintenance and construction, sortie scheduling, hazardous materials management, heavy equipment repair and maintenance, electronics repair and maintenance, roads and grounds maintenance and other duties.  Since 2012, Cayuse has staffed this 14,000+ acre site supporting training missions honing the skills of U.S. and allied military aviators and supporting service members with real-world target replications.

Holding Plant

Our Clients Agree

“It has not been easy, and our requirements have been tough, but you have been right there … No matter the time of day or night you answer the call ... (Leadership) gives accolades continuously to our team for our quick responses and data driven analysis we provide.  This would not be possible without your [Cayuse] oversight and direction.” (U.S. Agency) Deputy Chief

Hydroelectric Power Plant
Sewage Filtration


ISBEE Certified

Indian Small Business Economic Enterprise (ISBEE)

Indian Incentive Program

Indian Incentive Program (IIP)

The Indian Incentive Program is a congressionally sponsored program that provides a 5 percent rebate to a prime contractor on the total amount subcontracted to a Native American owned Economic Enterprise or Native American Organization in accordance with DFARS Clause 252.226-7001. Through the generation of subcontracts, the IIP serves as an economic multiplier for Native American communities. DoD prime contractors with a subcontract worth $500,000 or more that contains the DFARS clause are eligible for incentive payments.

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