Siegfried

Siegfried is a leading multidisciplinary design and engineering firm serving Northern and Central California for more than 70 years. Based in Stockton with offices in Modesto, Sacramento, San Jose, and Truckee, the company delivers integrated civil, structural, geotechnical, and landscape architecture solutions, complemented by surveying, project management, sustainable design, and grant writing services. Leveraging deep technical expertise and a collaborative approach, Siegfried helps clients navigate complex projects, supports community growth and resilience, and provides hands‑on management, regulatory guidance, and innovative design backed by advanced technology.