Company Profile

Civil Engineers and Land Surveyors serving California Since 1956

Kjeldsen, Sinnock & Neudeck, Inc. (KSN) is a full service civil engineering and land surveying firm with offices in Stockton and West Sacramento specializing in the surveying, mapping, planning, design and construction management of municipal, public works infrastructure, transportation, commercial, industrial, institutional, and water resources related projects. KSN has been providing professional services to public and private clients throughout California‚Äôs Central Valley since 1956. 

Our civil engineers and land surveyors have extensive experience in California and have helped KSN to establish an exceptionally strong reputation as one of the top civil engineering firms in California.  KSN is a certified Small Business Enterprise (SBE).

The firm currently serves as consultants to over forty communities, special districts, and local public agencies throughout the Central Valley and foothill areas, including San Joaquin, Yolo, Sacramento, Solano, Contra Costa, Alameda, Stanislaus, Calaveras, and Amador Counties. KSN has an unwavering commitment to professional integrity, upholding the standards of the engineering and surveying profession, and providing a quality work product to each and every one of our clients.  

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KSN Office, Stockton, CA

KSN's long history of successful projects comes from our commitment to providing a quality work product to all our clients. Contact KSN to discover how we help in all aspects of your project.