West Yost Associates

What West Yost Associates does

West Yost Associates is a privately held water resource management and engineering consulting firm founded in 1990 and headquartered in Davis, California. The firm exclusively serves public agencies — cities, counties, municipalities, sanitation districts, water districts, and utilities — across the Western United States, operating from 10 offices in California, Oregon, Washington, Nevada, and Arizona with a team of 245 professionals, including 160 certified engineers and specialists. Core service lines span water supply planning, infrastructure design (pipelines, pump stations, storage tanks, lift stations), groundwater management, water and wastewater treatment design (including nutrient removal and recycled water systems), program and procurement management, construction management and inspection, and a differentiated Operations Technology, Cybersecurity, and Resilience (OTCR) practice. Notable project scale includes consortium roles on the $330M Medford Regional Water Reclamation Facility overhaul, the $300M EchoWater Tertiary Treatment Facility at Sacramento Regional Wastewater Treatment Plant, the $600M Lower Northwest Interceptor program, and the $102M Modesto Phase 2 Biological Nutrient Removal project.

The firm's revenue model is professional services, with project-based pricing determined per engagement through public agency procurement processes, on-call contracts, and multi-year program management agreements. West Yost's OTCR practice represents its most differentiated technical offering, built on national-level partnerships with Idaho National Laboratory (adapting Consequence-driven Cyber-informed Engineering (CCE) methodology to water utilities) and AWWA (co-developing modules of the Utility Risk and Resilience Certification Program and updating AWWA's Cybersecurity Risk Management Guidance Tool). The firm has supported over 100 water utilities with AWIA-compliant risk and resilience assessments, designed over 100 storage facilities and 150+ miles of pipelines, and holds specialized expertise in Seismic Informed Engineering (SIE) for seismic-resilient water systems and Urban Water Management Planning under California Water Code. Marketing and demand generation rely on industry association leadership (AWWA, CWEA, APWA), conference presence, content marketing via the West Yost Word blog and a newsletter launched in January 2025, and direct client engagement through the public procurement process. Charles Duncan has served as President and CEO since 2012, and the firm operates as an employee-owned culture recognized as a Great Place to Work and named by Fortune in 2023 as one of the Best Small and Medium Workplaces in Consulting and Professional Services.

Name

West Yost Associates

Legal name

West Yost

Website

https://westyost.com

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

101–250 employees

Short description

West Yost Associates is a privately held water resource management and engineering consulting firm founded in 1990, exclusively serving public agencies across the Western United States with 245 professionals and 10 offices. The firm provides planning, design, construction management, OTCR cybersecurity, and specialized methodologies including CCE and SIE to cities, counties, sanitation districts, and water utilities.

Ownership category

akta.pro rank

Product category

Water Engineering Consulting Services

NAICS

Water Supply and Irrigation Systems (221310), Geophysical Surveying and Mapping Services (54136)

SIC

Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industries

Water, Wastewater & Stormwater Compliance (BPAHAJAJ), Data Management, LIMS & Compliance Software (ELN, eDMS, reporting automation) (EUANAJAE), Dewatering, Groundwater Control & Construction Hydrogeology (EUAHAFAG)

Keywords

• Water resource engineering
• Wastewater treatment design
• Water infrastructure consulting
• SCADA cybersecurity services
• Construction management inspection

Headquarters

HQ city

Davis

HQ country

United States

HQ region

North America

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering and Consulting Services: Professional services revenue generated from providing planning, design, and engineering consulting to public agencies for water, wastewater, recycled water, groundwater, and stormwater infrastructure. Revenue is project-based, derived from consulting engagements, master planning contracts, design contracts, and construction management contracts with cities, counties, municipalities, utilities, and water districts.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

West Yost is an engineering consulting firm that provides planning, design, and construction management services for water, wastewater, recycled water, groundwater, and stormwater infrastructure for cities, counties, municipalities, utilities, and water districts in the Western United States. The firm also offers operations technology, cybersecurity, and resilience services including SCADA design, AWIA risk and resilience assessments, and methodologies such as Consequence-driven Cyber-informed Engineering (CCE) developed with Idaho National Laboratory and Seismic Informed Engineering (SIE).

Product overview

West Yost is a water resource management and engineering consulting firm that provides professional services across eight core areas: Water Services, Infrastructure, Groundwater, Water and Wastewater Treatment, Operations Technology Cybersecurity and Resilience (OTCR), Program and Procurement Management, Construction Management and Inspection, and Data Services. The firm also offers specialized services including Consequence-Driven Cyber-Informed Engineering (CCE) developed with Idaho National Laboratory, Seismic Informed Engineering (SIE), and America's Water Infrastructure Act (AWIA) compliance services. Rather than a unified software platform, West Yost delivers integrated engineering and consulting services spanning planning, design, construction management, and ongoing operational support for public water agencies.

Differentiator

Problem solved

Functional benefit

Products and services

• Water Services Planning, modeling, and regulatory support for water utilities, including urban water management planning and water supply assessments. West Yost prepared 21 Urban Water Management Plans in the 2020 California cycle, all deemed complete without substantive revisions.
• Infrastructure Design of pipelines, pump stations, lift stations, and storage tanks for water and wastewater conveyance and storage. West Yost has designed over 100 storage facilities, pump and lift stations of every type and size, and more than 150 miles of large and small pipelines.
• Surface Water and Groundwater Groundwater management, monitoring, and planning services for sustainable water resources, including regulatory compliance, salt/nutrient monitoring, and recycled water recharge programs such as those delivered for the Chino Basin Watermaster.
• Water and Wastewater Treatment Planning, design, and construction support for water and wastewater treatment facilities, including nutrient removal and recycled water systems. Major engagements include the $300 million EchoWater Tertiary Treatment Facility, $102 million Phase 2 BNR/Tertiary Treatment Project for the City of Modesto, and the $90 million City of Davis wastewater treatment plant upgrade (LEED Silver certified).
• Operations Technology, Cybersecurity and Resilience (OTCR) SCADA design and implementation, cybersecurity assessments, risk and resilience assessments, electrical instrumentation and controls, and emergency response planning for water utilities. The OTCR team has supported over 100 water utilities with risk and resilience assessments, cyber-risk assessments, and emergency preparedness exercises.
• Program and Procurement Management Capital improvement program delivery and asset management solutions for municipalities, including CM/GC procurement approaches. West Yost provided owner's advisory engineering for the $90 million City of Davis wastewater treatment plant upgrade and delivered the $600 million Lower Northwest Interceptor program (CMAA 2008 National Project of the Year).
• Construction Management and Inspection Construction administration, inspection, and oversight for water and wastewater projects ensuring quality and compliance. Includes design-build CM experience on projects up to $70 million and full-scale CM/GC inspection teams.
• Data Services Helps clients organize and connect critical information across systems and workflows, strengthens data quality, structure, and accessibility, automates repetitive data and reporting tasks, and builds dashboards and reporting tools for planning, operations, and compliance needs.
• Consequence-Driven Cyber-Informed Engineering (CCE) A methodology developed in partnership with Idaho National Laboratory, adapting Consequence-driven Cyber-informed Engineering from the nuclear and energy sectors to protect water-sector SCADA systems so utilities can still deliver drinking water even if a SCADA system is compromised.
• Seismic Informed Engineering (SIE) Holistic approach to planning, design, and implementation of water systems with resilience to seismic events, expanding upon accepted seismic design by including mechanical, electrical, communications, and control systems as elements of resilience.
• AWIA Risk and Resilience Compliance Services Risk and Resilience Assessments (RRAs) and Emergency Response Plans (ERPs) under America's Water Infrastructure Act of 2018 for water systems serving populations greater than 3,300. West Yost has assisted more than 20 clients with AWIA-compliant RRAs and ERPs.

Quantifiable outcome

• Reduced chemical use and emissions through fermentation for EBPR, real-time SRT and DO controls, and surface wasting in nutrient removal systems.
• +6 more outcomes

Named customers13 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core, supporting and project-level.

• Idaho National Laboratory (INL)coreStrategic or Co-development PartnerWest Yost is working with Idaho National Laboratory (INL) to adapt the Consequence-driven Cyber-informed Engineering (CCE) methodology to the water sector. CCE was originally developed to protect facilities within the Nuclear and Energy sectors from cyber attacks. West Yost assists clients in determining the best approach for applying CCE within their control systems to protect assets, staff, and customers.
• American Water Works Association (AWWA)coreStrategic or Co-development PartnerWest Yost supports AWWA's efforts in risk and resilience assessments, cybersecurity, and emergency response plans. West Yost has conducted cybersecurity training for utility staff, developed two of the five-module Utility Risk and Resilience Certification Program, led updates to the AWWA Cybersecurity Risk Management Guidance Tool, and delivers outreach to small and rural systems.
• BAYWORKsupportingStrategic or Co-development PartnerWest Yost participates in BAYWORK, a collaborative initiative established in 2009 focused on ensuring operational reliability in water and wastewater utilities. BAYWORK is dedicated to workforce development, training, and research to prepare mission-critical staff for evolving industry challenges including cybersecurity. West Yost's Andrew Ohrt participates in BAYWORK panels and industry events.
• Slayden Constructorsproject-levelImplementation/ SI/ Consulting PartnerPart of a consortium delivering the $330 million Medford, Oregon Regional Water Reclamation Facility overhaul, along with West Yost, Black & Veatch, and Carollo Engineers. West Yost provides engineering services within this project team.
• Black & Veatchproject-levelImplementation/ SI/ Consulting PartnerPart of a consortium delivering the $330 million Medford, Oregon Regional Water Reclamation Facility overhaul. Black & Veatch provides engineering services alongside West Yost within this project team.
• Carollo Engineersproject-levelImplementation/ SI/ Consulting PartnerPart of a consortium delivering the $330 million Medford, Oregon Regional Water Reclamation Facility overhaul. Carollo Engineers provides engineering services alongside West Yost within this project team.

Scale indicators13 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• HDR Inc. HDR is a broad incumbent E&C firm with strong water and wastewater capabilities serving municipal clients. Comparable service offerings across planning, design, and program management, but with significantly broader sector reach (transportation, buildings, federal) than West Yost.
• Stantec: Stantec is a broad incumbent E&C firm with a significant water practice (including the former MWH Global business). Competes with West Yost for municipal water/wastewater planning and design work across North America, with broader geographic reach and integrated delivery capabilities.
• Tetra Tech: Tetra Tech is a broad incumbent E&C firm specializing in water, environment, and sustainable infrastructure. Provides high-altitude peer comparison on water-only focus (Tetra Tech is closest to West Yost's pure-play positioning among public firms) but at much larger scale and global reach.
• AECOM: AECOM is a broad incumbent E&C firm with substantial water practice. Competes for the same large-scale municipal water infrastructure programs and offers broader services (design-build, program management, environmental remediation) at global scale — a competitor for marquee West Yost programs.
• Jacobs Solutions: Jacobs is a broad incumbent E&C firm with a large Critical Mission Solutions and water practice. Competes with West Yost for major municipal water programs but offers significantly broader capabilities (federal, energy, transportation) and global delivery scale that West Yost cannot match.

Direct peers

• Hazen and Sawyer: Hazen and Sawyer is a direct peer in water and wastewater engineering consulting for municipal clients. Similar size, similar pure-play water focus, comparable service lines (planning, design, construction management, treatment). Both compete for the same AWIA compliance, treatment plant upgrades, and pipeline rehabilitation programs.
• Brown and Caldwell: Brown and Caldwell is one of the largest pure-play water and environmental engineering consulting firms in the US, directly comparable to West Yost in customer base (municipal utilities), service mix (planning/design/CM), and water-only focus. Headquartered in California, with similar Western US municipal client overlap.
• Carollo Engineers: Carollo Engineers is a direct peer — a privately-held, water-only engineering consulting firm serving municipal water and wastewater clients across the Western US. Co-listed with West Yost as part of the Medford RWRF consortium, making them head-to-head competitors for the same public agency programs in California, Oregon, and beyond.
• Black & Veatch: Black & Veatch is a direct peer and consortium partner on the Medford RWRF project. Offers comparable water/wastewater engineering services plus broader design-build and EPC capabilities that West Yost cannot match standalone — a key competitor/partner for mega-programs in the public water sector.

Emerging players

• Woodard & Curran: Woodard & Curran is an emerging player in water and environmental engineering consulting with similar pure-play positioning to West Yost but a smaller national footprint. Comparable service mix across water, wastewater, and stormwater for municipal clients, with growing geographic reach in the Western US.

Market position

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/westyost
• LinkedInlinkedin.com/company/west-yost-associates
• Instagraminstagram.com/westyostwater
• Xx.com/westyost

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 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 West Yost Associates