Oneida Engineering Solutions, LLC (OES) is a DBE and SBA-certified 8(a) Native American, tribally-owned company providing engineering and environmental consulting services for public and private sector clients across the United States. OES integrates engineers, scientists, professionals and construction managers for delivery of services on infrastructure, facility and development projects.

OES is a wholly-owned company of the Oneida ESC Group which is owned by the Oneida Nation of Wisconsin. Oneida ESC Group has networked offices coast-to-coast that draws upon the knowledge and experience of over 400 employees.

We work closely with state and local municipalities, government agencies, commercial clients and public-private partnerships to solve the most complex challenges that improve the communities where we live and work.

OES offers engineering and technical services developed through more than 30 years of experience.

Engineering and Inspections – initial site studies and surveying to final engineering design packages, engineering support for construction oversight and inspections through the development life cycle; transportation engineering design and construction management, bridge Inspection, surveying, and natural resources services.

Facilities – integrated structural, mechanical, electrical, and plumbing engineering to design and maintain resilient, sustainable, and energy efficient facilities.

Environmental – achieving compliance and eliminating risks while protecting our natural environment; remediation and restoration services using innovative and traditional technologies to address real estate environmental liabilities; partner to guide regulatory permitting and compliance.

Construction and Demolition – construction management and permitting, hazardous materials abatement, material recovery/recycling and natural resources restoration for demolition and rehabilitation.

OES’s work culture is founded on the economic, social and environmental (ESG) pillars and with planning considerations for resiliency that reduce risk and impact of an event and speed the recovery.


  • Wisconsin
  • California
  • Illinois
  • Texas
  • Minnesota
  • Florida
  • Georgia

OES is SBA 8(a) certified

DUNS: 059936115

Primary NAICS Code:

541330  Civil engineering services

Secondary NAICS Codes

237310  Highway, Street, and Bridge Construction

541350  Building Inspection Services

541370  Surveying and Mapping

541611  Administrative Management and General Management Consulting Services

541618  Other Management Consulting Services

541620  Engineering and Environmental Consulting Services

541690  Other Scientific and Technical Consulting Services

541720  Research and Development in the Social Sciences and Humanities

541820  Public Relations Agencies