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Group Delta Consultants, Inc., a geotechnical engineering, materials testing and inspection firm, has offices located in Irvine, Torrance, Ontario, San Diego, the Bay Area, and Victorville. We have a staff of 125+ highly skilled professionals consisting of civil and geotechnical engineers, engineering geologists, laboratory and field technicians, deputy inspectors, drafting/CADD, and drilling and support personnel specialized in their respective fields. In addition, we have licensed and experienced deputy inspectors and technicians specialized in their respective fields (including concrete, masonry, batch plant, fireproofing, shotcrete, soils, structural steel, non-destructive testing and welding) to provide construction observation and testing services.

We provide exceptionally innovative and dependable geotechnical consulting, environmental consulting, and construction management testing services for public and private sector clients throughout Southern California.

As an employee-owned (ESOP) company, our staff has a personal vested interest in our company’s success and we take pride in the quality and level of service we provide.


Group Delta's laboratories are licensed and/or certified as Approved Testing Facilities by the City of Los Angeles, Caltrans, AASHTO, and Division of the State Architect (DSA). Our San Diego laboratory has been awarded accreditation to the technical competence and quality assurance requirements of ISO/IEC 17025:2005 as determined AASHTO.

Dr. Daniel Pradel

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