KJELDSEN, SINNOCK & NEUDECK, INC.

As a Small Business Enterprise serving clients throughout Central California for over 65 years, Kjeldsen, Sinnock & Neudeck, Inc. (KSN), specializes in the planning, design, and surveying for various civil engineering projects such as flood control, water utilities, water resources, emergency response, environmental restoration, and various services for transportation and institutional related projects. KSN has the expertise and capability to handle all phases of project development from initial planning and design, construction management, and beyond to supporting maintenance and operation of the completed project. 

NOW OPEN: KSN’s Lodi Office! 🎉

KSN is happy to announce the opening of our new office location at 323 West Elm Street in Lodi, California. This expansion facilitates the firm’s growth and reinforces our team’s presence in the Central Valley.

With this office, we are expanding our technical capacity by adding several experienced and talented members to the KSN team. Senior-level engineers and surveyors Josh Elson, Steve Pechin, and Jimmy Ryan are joined by Curtis Roth, Carter Thomas, and Wesley Roper, further strengthening our design and field capabilities.

As we head into the new year, the opening of our new office marks an exciting step forward for KSN as we continue to invest in our people, our services, and the regions we proudly serve.

"Victoria Island Emergency Incident" recognized as ACEC California's 2026 Engineering Excellence Award & APWA Sacramento Section's 2025 Project of the Year

Disaster/Emergency Construction Category

KSN led an urgent, multi-agency response, at Reclamation District 2040 – Victoria Island, to stabilize a failing levee, protect critical state infrastructure, and turn an imminent disaster into a model of resilience. KSN’s services included Construction Management, Emergency Response and Recovery, District Engineering, ongoing support during the installation of the steel piling cut off wall, 24/7 site monitoring, and coordination with over a dozen local, regional, and state agencies.

Civil Engineering
& Surveying Services

KSN’s highly qualified staff has the experience and qualifications to deliver a broad range of professional services to ensure that our client’s projects are successfully delivered with the efficiency and the attention to detail expected in today’s market. KSN has extensive experience in the successful delivery of large, complex public infrastructure and public facility projects using the design-build delivery method. KSN is a certified California Small Business Enterprise.

CIVIL ENGINEERING

surveying-and-mapping

SURVEYING & MAPPING

construction-management-white

CONSTRUCTION MANAGEMENT