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Siegfried is recognized as one of the foremost design and engineering firms in northern and central California, as measured by our clients, our employees, and our community. We have been shaping success for businesses and communities since 1955. Siegfried solves our clients’ toughest challenges, making complex projects not only manageable but truly successful. Our innovative approach and technical expertise continue to shape the success of communities and businesses throughout the region and beyond.

Clients appreciate our clear communication and ability to anticipate and follow through on client and agency needs. Most importantly, clients benefit from our ability to handle the budgetary, regulatory, and other details that determine the success of every project.

The History of Siegfried
  • 2019 – Siegfried buys and renovates their own office building in Stockton, located at 3428 Brookside Road
  • 2018 – Siegfried expands and opens a Modesto Office
  • 2017 – Siegfried’s Design Build resume tops $1 Billion
  • 2016 – Siegfried begins design on the $6m UCSC Quarry Amphitheater Renovation
  • 2015 – Siegfried acquires Beals Alliance
  • 2014 – Siegfried’s Design Build resume tops $750 Million
  • 2013 – Siegfried starts its 20th UC project
  • 2012 – Siegfried growth allows for new offices in San Jose and Sacramento.
  • 2012 – Siegfried hires their first LEED Accredited Professional.
  • 2011 – The firm provides engineering services for the LEED Platinum UC Davis Student Community Center Design-Build project.
  • 2000s – The firm is contracted as civil engineer for DeCarli Square seawall, plaza and cineplex, Hotel Stockton plaza, events center, The Record expansion, transit center, and County WorkNet complex.
  • 2005 – Siegfried celebrates its 50th anniversary. Mayor Edward Chavez proclaims the firm a defining factor in the growth of Stockton and San Joaquin County.
  • 2008 – Siegfried moves its corporate office after 41 years.
  • 2009 – Siegfried hires their first Director of Marketing.
  • 1980s & 1990s – The firm engineers Brookside; a cutting edge golf course and water-oriented community. Siegfried remains the reclamation district engineer for the project levees.
  • 1992 – Robert Siegfried retires and the firm is renamed Siegfried Engineering, Inc. Siegfried invests in new technologies including computer-assisted design.
  • 1980s & 1990s – The firm engineers Brookside; a cutting edge golf course and water-oriented community. Siegfried remains the reclamation district engineer for the project levees.
  • 1970s – In a cooperative effort, Siegfried works with Stockton Redevelopment Agency to develop the Stockton south channel bank, north banks, and other seawall and promenade projects.
  • 1960s – Siegfried begins engineering work for Lincoln Village West.
  • 1960s – Siegfried acts as reclamation district engineer for community levees.
  • 1966 – Siegfried purchases headquarters at 4045 Coronado Avenue, Stockton. Subsequent additions would eventually almost triple the building size.
  • 1966 – The firm now employs 23 staff members.
  • 1955 – Robert W. Siegfried founds R.W. Siegfried & Associates.
  • Late 1950s – Siegfried begins 45-year tenure as city engineer for the City of Ripon.

In the 1970s and 1980s, Siegfried was the engineer for the Stockton Waterfront project in a cooperative effort between the Redevelopment Agency and a private developer including:

  • Warehouse and Office Towers
  • Delta Gateway Apartments
  • Waterfront Infrastructure Improvements

In the 1960s Siegfried was the engineer for the Stockton West End Redevelopment Projects in downtown Stockton including:

  • Demolition of Downtown City Blocks for Redevelopment
  • Downtown Pedestrian Malls
  • Hunter Square Plaza
  • Lee Center
  • Bank of America
  • Central District Parking Lots
Employees also spend countless hours of their own time supporting activities, such as:
  • Blood drives
  • Holiday donations and “giving trees”
  • Fundraising drives to assist victims of disasters
  • Donations to food banks
  • Runs and walks for funding breast cancer research, diabetes, and muscular dystrophy
  • United Way
  • Kiwanis International
  • Rotary Club of Stockton
Our high profile engineering projects have included the prestigious master-planned residential developments in Stockton such as Lincoln Village West, Quail Lakes, Venetian Gardens, Venetian Bridges, and Brookside Estates. For these communities, Siegfried was recognized for its innovative engineering design of stormwater retention basins which are also used as architectural and recreational features, equalization storage of wastewater for disposal during low peak flows, rehabilitation and reinforcement of existing levees and the creation of high ground for flood protection from a 100-year flood event.
Siegfried celebrated its Golden Anniversary on April 20, 2005. A gala event was held on the Roof Garden of the newly restored historical landmark, the Hotel Stockton. We received media coverage the same year in Stockton’s newspaper The Record. View the article (pdf).
Siegfried continues to grow and change, constantly contributing to the successes of clients and the community.
Siegfried Engineering