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Incorporated in California in April 1986, Group Delta has provided geotechnical and environmental engineering, instrumentation, materials testing and inspection, and construction support services for more than 30 years.

Group Delta is staffed by 125 civil and geotechnical engineers, environmental engineers and scientists, geologists, laboratory and field technicians, deputy grading and construction inspectors, CADD designers and support staff. Group Delta maintains offices in the cities of Irvine, Torrance, Anaheim, San Diego, Ontario, Vacaville and Walnut Creek, as well as accredited laboratories in San Diego and Anaheim.

Our firm has served clients in both the public and private sectors throughout its history and has developed expertise in various types of projects.


Browse our project experience by market or service category.


Learn more about our unique company culture and discover available opportunities!


We have a history of providing exceptional services for more than 30 years. Find out more about each service type and how we can help you reach your project goals.


From airports to elementary schools – find out more about the exciting range of markets we serve.


We are excited to have offices in seven locations across the state of California.

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