About Us

Established in 2006, Sequoia Consultants are an industry leader in construction quality assurance and quality control services. The services are offered across the State of California through its offices in Orange, Ontario, Inglewood, and San Diego. Sequoia Consultants is an industry leader in construction quality solutions to the transportation sector. We partner with our clients to deliver projects with utmost quality and integrity. Our strong work ethic in conjunction with relentless determination to serve and guide our clients form the foundation for our approach to every project we undertake. Sequoia is signatory to Operating Engineers, Local 12.

What We Do

While a heavy concentration is placed on the services to the transportation sector, Sequoia provides comprehensive quality assurance and quality control solutions to the entire construction industry through professional and technical services in materials engineering, construction inspection, and materials testing.

Sequoia’s professional and technical team includes licensed civil and geotechnical engineers, quality managers, and certified materials testers and inspectors, all of whom have demonstrated experience in the respective disciplines.

Our Process

Sequoia specializes in construction materials testing and construction inspection of soils and earthwork, HMA/PCC paving, reinforced/precast/prestressed concrete, structural steel welding/fabrication/non-destructive testing, and special inspections in all categories. Our quality management system has been designed to meet the requirements of ISO 17025, AASHTO R18, ASTM E329, and various quality standards for concrete and aggregates (ASTM C1077), road and paving materials (ASTM D3666), and soil (ASTM D3740). Sequoia’s full-service laboratory facilities are accredited, certified and/or validated by AASHTO Accreditation Program (AAP), Caltrans, City of Los Angeles, and US Army Corps of Engineers (USACE).

Why Choose Us

Over the years, Sequoia has earned a reputation for professional excellence, demonstrated competence, and a high level of expertise and commitment in the services provided. By concentrating primarily in the transportation sector, Sequoia has been able to channel its strength and dedication to deliver high quality materials testing and inspection services to its clients with a well-focused approach. Sequoia’s strong work ethic, combined with relentless determination to serve the clientele at the highest possible level, form the foundation for its approach to every assignment undertaken.

Sequoia offers unparalleled depth and experience in the Alternate Delivery Method projects including P3, Design-Build, Progressive Design-Build, CMGC and CMAR. This is highlighted by the fact that the firm’s Alternate Delivery Method project portfolio to date includes over 13 projects, exceeding $13 Billion in value.

Accreditations and Certifications

Sequoia’s quality management system is evaluated by national, state, and regional agencies as a basis for our numerous accreditations and certifications.
Our full-service laboratory facilities are all AASHTO Accredited and certified by Caltrans. They receive laboratory assessments and participate in proficiency sample programs administered by:

Additional onsite and/or remote evaluations of our full-service, remote, and mobile laboratory facilities may be performed by the following agencies:

The quality standards evaluated by these agencies include:

  • ISO 17025 International Standard for Testing and Calibration Laboratories
  • AASHTO R18 Quality Management System for Construction Materials Testing Laboratories
  • ASTM E329 Specification for Construction Inspection and Testing
  • Various other ASTM quality standards specific to particular material types (e.g. C1077 concrete and aggregates, D3666 road and paving materials, D3740 soil)

Please see the agencies individual websites to look up the current scope of accreditation held at each of our laboratory facilities.