Kjeldsen, Sinnock & Neudeck

What Kjeldsen, Sinnock & Neudeck does

Kjeldsen, Sinnock & Neudeck, Inc. (KSN) is a privately held civil engineering and land surveying firm founded in 1956 and headquartered in Stockton, California. The firm operates four California offices (Stockton headquarters, West Sacramento, Lodi, and Red Bluff) and serves public-sector clients across the Central Valley, Sacramento–San Joaquin Delta, Sierra Nevada foothills, and East Bay. KSN is a certified California Small Business Enterprise with a team of over 60 professional staff, including Registered Civil Engineers, Professional Land Surveyors, Construction Managers, and Inspectors, organized under four principals.

The firm delivers five integrated service lines: Civil Engineering (planning, design, and design-build delivery for public works, transportation, water resources, and institutional projects); Environmental Restoration (fish rescue facilities, salmon habitat programs); Surveying & Geospatial (3D laser scanning, right-of-way engineering, topographic mapping, bathymetric surveys, GIS data collection); Construction Management (project and program management, inspection); and Emergency Response & Recovery Planning (flood operations plans, GIS-based maps, preliminary engineering designs, and a Just-in-Time Training program). Notable technical differentiators include 3D laser scanning for limited line-of-sight environments such as tunnels and DAFT galleries, and the firm's authorship of regional standards for Northern California flood emergency response planning.

KSN generates revenue through project-based professional consulting fees on multi-year contracts with municipalities, special districts (reclamation, water, sanitary), water districts, and California state agencies including the California Department of Water Resources and California Department of Corrections and Rehabilitation. Documented engagements span Mule Creek State Prison ($330M total construction value), Downtown Stockton Marina ($22M), Levee Seepage Repair Phase III ($62M), the Wallace Weir Fish Rescue Facility ($16M, taken from concept to construction in eight months), and emergency levee repairs at Tyler Island and Victoria Island. Distribution is direct enterprise field sales to public agencies, often as prime consultant or sub-consultant on multi-disciplinary teams alongside firms such as HDR Engineering and Brown and Caldwell.

Name

Kjeldsen, Sinnock & Neudeck

Legal name

Kjeldsen, Sinnock & Neudeck, Inc.

Website

https://ksninc.com

Company type

Private

Founded year

1956

Operating status

Operating

Headcount range

11–50 employees

Short description

Kjeldsen, Sinnock & Neudeck is a privately held civil engineering and land surveying firm founded in 1956, serving municipalities, special districts, and California state agencies across the Central Valley with planning, design, surveying, construction management, and flood emergency response services.

Ownership category

akta.pro rank

Product category

Civil Engineering Consulting

NAICS

Architectural, Engineering, and Related Services (5413), Environmental Consulting Services (54162)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industries

Water, Wastewater & Stormwater Compliance (BPAHAJAJ), NRW Data Management & Water Balance (IWA Methodology, GIS/SCADA Integration, Digital Twins) (EUANAKAJ)

Keywords

• Civil engineering services
• Land surveying
• Construction management
• Flood emergency planning
• Environmental restoration

Headquarters

HQ city

Stockton

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Professional Engineering Consulting Services: Revenue is generated through professional consulting services for civil engineering, land surveying, construction management, and emergency planning projects with public sector clients including municipalities, special districts, and government agencies.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Kjeldsen, Sinnock & Neudeck (KSN) provides civil engineering, land surveying, environmental restoration, construction management, and emergency response/recovery planning services to public sector clients throughout Central California. The firm delivers projects from initial planning and design through construction management and ongoing maintenance support, with specialization in flood control, water resources, water utilities, transportation, and institutional facilities.

Product overview

KSN is a civil engineering and land surveying firm offering five interconnected core service lines: Civil Engineering Services covering infrastructure, transportation, and water resources; Environmental Restoration Services for habitat and salmon restoration; Surveying & Geospatial Services including 3D laser scanning and GIS mapping; Construction Management Services for project delivery; and Emergency Response & Recovery Planning Services including Just-in-Time Training programs. The firm serves public agencies throughout Central California, specializing in flood control, water utilities, and water resources projects. As a certified California Small Business Enterprise, KSN handles all phases from planning and design through construction management.

Differentiator

Problem solved

Functional benefit

Products and services

• Civil Engineering Services Full complement of civil engineering services for public works infrastructure, transportation, water resources, commercial, industrial, and institutional projects, including design-build delivery method, delivered to public sector clients.
• Environmental Restoration Services Environmental restoration services including fish rescue facilities and salmon habitat restoration programs in Northern California for public agencies and environmental districts.
• Surveying & Geospatial Services Professional land surveying services including 3D high-definition laser scanning, right-of-way engineering, topographic mapping, construction staking, bathymetric surveys, and GIS data collection for public and private clients.
• Construction Management Services Construction management and inspection services for projects designed by KSN as well as third-party construction management on multi-year and multi-phase construction programs for public agencies.
• Emergency Response & Recovery Planning Services Flood emergency response planning services for Northern California including development of regional standards for Emergency Operations Plans, GIS-Based Maps, Preliminary Engineering Designs, and a Just-in-Time Training program for Emergency Levee Workers.

Quantifiable outcome

• Delivered Mule Creek State Prison Infill Complex - 544,000 sq ft, 23 buildings in 24 months
• +3 more outcomes

Named customers7 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• US Army Corps of EngineerscoreStrategic or Co-development PartnerOngoing working relationship with regulatory agency for flood control and water resource projects. Company has extensive experience coordinating with USACE on levee improvement projects, FEMA certifications, and permitting for infrastructure projects in the Sacramento-San Joaquin Delta.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• West Yost Associates: California-headquartered civil engineering firm specializing in water, wastewater, and stormwater infrastructure for municipalities and special districts. Closely comparable to KSN in service mix, public-sector client base, and regional focus on Northern/Central California.
• Carollo Engineers: National water and wastewater engineering consulting firm serving municipal utilities and water districts. Highly comparable to KSN in core water/wastewater engineering expertise, though significantly larger in scale and geographic reach.
• Brown and Caldwell: Environmental engineering and consulting firm specializing in water and wastewater infrastructure for municipalities and industrial clients. Directly comparable to KSN's wastewater and water utility work; listed as a customer of KSN's 3D laser scanning services.
• Woodard & Curran: Engineering, operations, and consulting firm focused on water, wastewater, and environmental infrastructure for municipalities and industrial clients. Comparable mid-size peer to KSN with overlapping public-sector water expertise and project delivery model.
• Mead & Hunt: Engineering and architectural firm with strong water, transportation, and infrastructure practices serving public agencies. Comparable to KSN in mid-size scale, public-sector focus, and multi-disciplinary civil engineering delivery.

Broad incumbents

• HDR Engineering: Global full-service engineering, architecture, and consulting firm with significant water resources, infrastructure, and environmental practices. Comparable to KSN's water resources and infrastructure work; identified as a KSN customer/partner relationship.
• AECOM: Global infrastructure consulting firm with major water, environment, and transportation practices serving public agencies. Comparable in service breadth but at vastly larger scale than KSN, particularly relevant for large flood control and water infrastructure pursuits.
• Jacobs Solutions: Global professional services firm with deep water, environment, transportation, and infrastructure consulting practices. Overlaps with KSN's water resources and flood control work at larger project scales typically pursued through prime or sub-consultant roles.
• Stantec: Global design and consulting firm with strong water, infrastructure, and environmental practices serving municipalities and water agencies. Comparable to KSN in target clients (cities, water districts) though operating at materially greater scale and geographic breadth.
• Tetra Tech: Global consulting and engineering firm with major water, environment, and infrastructure practices serving federal, state, and municipal clients. Comparable to KSN's water and environmental restoration portfolio though at materially larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/ksninc
• LinkedInlinkedin.com/company/ksninc
• Instagraminstagram.com/ksninc

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Kjeldsen, Sinnock & Neudeck