Siegfried Engineering

The History of Siegfried Engineering

Founded in 1955 by Robert W. Siegfried, Siegfried Engineering, Inc. is the largest engineering firm based in San Joaquin County providing professional services in civil engineering, structural engineering, land surveying, hydrographic surveying and planning. The firm is currently headed by Lex A. Corrales, President, and Co-Principals Anthony J. Lopes, Rodney W. Gray and Paul J. Schneider. SEI has grown to an experienced and valuable staff of 43 employees over the last 50 successful years.

The technical contributions of a civil engineering firm such as Siegfried Engineering to the growth and development of a City is not easily apparent or understood by the public. However, over past fifty years, the company's engineering projects have significantly contributed to the changing face of the Stockton vicinity.

1950s 1960s 1970s 1980s 1990s 2000s
  • 1955 – Robert W. Siegfried founds R.W. Siegfried & Associates.
  • Late 1950s – SEI begins 45-year tenure as city engineer for the City of Ripon, CA.
  • 1960s – Siegfried Engineering begins engineering work for Lincoln Village West.
  • 1960s – SEI acts as reclamation district engineer for community levees.
  • 1966 – SEI purchases headquarters at 4045 Coronado Avenue, Stockton. Subsequent additions would eventually almost triple the building size.
  • 1966 – The firm now employs 27 staff members.
  • 1970s – In a cooperative effort, SEI works with Stockton Redevelopment Agency to develop the Stockton south channel bank, north banks and other seawall and promenade projects.
  • 1980s & 1990s – The firm engineers Brookside, a cutting edge golf course and water-oriented community. SEI remains the reclamation district engineer for the project levees.
  • 1980s & 1990s – The firm engineers Brookside, a cutting edge golf course and water-oriented community. SEI remains the reclamation district engineer for the project levees.
  • 1992 – Robert Siegfried retires, and the firm is renamed Siegfried Engineering, Inc. SEI invests in new technologies including computer-assisted design.
  • 2000s – The firm is contracted as civil engineer for De Carli Square seawall, plaza, and cineplex and Hotel Stockton plaza, events center, The Record expansion, transit center and county WorkNet complex.
  • 2005 – Siegfried Engineering, Inc. celebrates its 50th anniversary. Mayor Edward Chavez proclaims the firm a defining factor in the growth of Stockton and San Joaquin County.
Click on a decade to learn about SEI’s history.

In the 1960's, SEI was the engineer for the 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

In the 1970's and 1980's, SEI was the engineer for the 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

Recently, SEI was the civil engineer for:

  • Seawall and Promenade for the Stockton Channel South Bank and North Banks
  • DeCarli Square Seawall and Plaza
  • Cineplex and Hotel Stockton Plaza
  • Stockton Events Center including Baseball Park Arena, and Hotel
  • Record Expansion
  • Transit Center
  • County Worknet Complex

The firm's 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 Engineering was recognized for its innovative engineering design of storm water retention basins being also useable as architectural and recreational features, equalization storage of wastewater for disposal during low peak flows, and rehabilitation and reinforcement of existing levees and the creation of high ground for flood protection from the 100-year flood event for urban developments in Stockton.

Siegfried Engineering 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. The firm received media coverage the same year in Stockton's newspaper The Record. View the article (pdf).

SEI continues to grow and change, constantly contributing to the successes of clients and the community.