Siegfried Information

For over 70 years, Siegfried has been one of the foremost multidisciplinary design and engineering firms in Northern and Central California. Headquartered in Stockton, with locations in Modesto, Sacramento, San Jose, and Truckee, we partner with our clients to navigate complex projects and provide creative solutions that work. Our work supports the growth and resilience of communities and businesses throughout the region. Through our civil engineering, structural engineering, geotechnical engineering, landscape architecture, surveying, and grants and public outreach services, we bring creative thinking, technical expertise, and decades of experience to every project.