Siegfried Engineering, Inc.

About Us

At Siegfried, every project is an opportunity to solve challenges in a way that works for our clients and the communities they serve. With expertise in civil engineering, structural engineering, geotechnical engineering, surveying, landscape architecture, grants and outreach, and construction administration and management, we take a collaborative approach to bring ideas to life. For over 70 years, we’ve been turning complex problems into practical, lasting solutions— blending creativity with technical know-how to design spaces that are both functional and meaningful. Every client’s needs are unique, and we’re here to help navigate the process with experience, insight, and a commitment to getting it right.
For over seven decades, Siegfried has been a pillar of creativity, innovation, and unwavering dedication to building a better future for our community. After serving in the Navy and being the officer in charge of the development of Rough and Ready Island in the Port of Stockton, Robert W. Siegfried began his post-war career with a small local Stockton firm, where he honed his expertise and forged key professional relationships. His ambition, driven by a vision for the future, led to the formation of R.W. Siegfried & Associates in 1955 where the office was located at the corner of El Dorado and Pine. This bold step laid the groundwork for a firm that would go on to shape the landscape of Northern and Central California for generations.