Group Delta Consultants, Inc., a geotechnical engineering, materials testing and inspection firm, has offices located in Irvine, Torrance, Ontario, San Diego, Sacramento, Victorville, and Seattle. 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. Specialties Geotechnical Engineering, Construction Materials Testing and Inspection, Geotechnical Forensic Services, Environmental Engineering