Public engineering firm directory

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A2Z Engineering, PLLC

Kalispell, MT

Civil and Structural Engineers Montana

WebsitePhone1 office2 projects1 leadersFounded 1986Updated Jun 2026

Project: Flathead Lake Engineered Septic System

Service: PowerService: Substation DesignService: Transmission Line DesignIndustry: Electric UtilitiesIndustry: Land DevelopmentType: Civil Engineering+19 more

AE2S

Bismarck, ND

Empowering People. Enhancing Lives.

Website22 offices6 leadersFounded 1991Updated Jun 2026

Service detail: Water and Wastewater Engineering

Service: Water and Wastewater EngineeringService: WaterService: WastewaterIndustry: Automation & ControlsIndustry: Environmental & RemediationType: Civil Engineering+29 more

Big Sky Civil & Environmental, Inc.

Great Falls, MT

Engineering Solutions for Complex Projects

WebsitePhone1 office3 projects3 leaders1 credentialsFounded 2008

Project: Great Falls Town Pump

Service: Water SystemsService: Water TreatmentService: StorageIndustry: Water SupplyIndustry: WastewaterType: Civil Engineering+31 more

CTL|Thompson, Inc.

Denver, CO

Engineering consultants and field technicians providing geotechnical, structural, materials, and environmental solutions.

WebsitePhone9 offices3 projectsFounded 1971Updated Jun 2026

Project: The Aurora Highlands

Service: Geotechnical EngineeringService: Provides Specialized Ground CharacterizationService: Subsurface Exploration To Support Foundation RecommendationsIndustry: CommercialIndustry: ResidentialType: Environmental Engineering+29 more

Coldwater Engineering

Helena, MT

Coldwater Engineering is a Helena, Montana-based civil engineering practice specializing in hydrology and hydraulics, railroad engineering, environmental permitting, and survey. Founded around railroad infrastructure, it has completed nearly a thousand Class I railroad projects across 23 states, with long-term master services agreements with Union Pacific Railroad and Kansas City Southern. Core capabilities include bridge opening analysis, scour analysis and countermeasure design, floodplain permitting, streambank stabilization, and wetland delineation.

WebsitePhone1 office4 projects4 leaders1 credentialsUpdated Jun 2026

Project: Union Pacific Railroad Bridge 59.43 - Milwaukee Subdivision, Wisconsin

Service: Hydrology and HydraulicsService: Bridge Opening Analysis and DesignService: Scour Analysis and Countermeasure DesignIndustry: RailIndustry: BridgesType: Civil Engineering+18 more

DJ&A, P.C.

Missoula, MT

Engineering, Surveying, Environmental & Planning Services

WebsitePhone3 officesFounded 1973Size Estimate: 150+ employeesUpdated Jun 2026

Service detail: Transportation Engineering

Service: Transportation EngineeringService: Roadway and Highway DesignService: Logging Road EngineeringIndustry: FederalIndustry: GovernmentType: Civil Engineering+43 more

Herrera Environmental Consultants

Seattle, WA

Applying science and design in innovative ways

WebsitePhone6 offices3 projectsFounded 1980Size Estimate: 100-199 employeesUpdated Jun 2026

Project: Swan Creek Park Expansion

Service: WaterService: River Engineering and ManagementService: Stream Engineering and ManagementIndustry: GovernmentIndustry: Environmental & RemediationType: Environmental Engineering+24 more

Human Powered Future PLLC

Missoula, MT

Engineering a world that can be comfortably shared by all.

WebsitePhone1 office2 projects1 leaders6 credentials1 publications

Project: Syringa Bike Park Safety Improvements

Service: Forensic EngineeringService: Expert Witness ServicesService: Biomedical EngineeringIndustry: CommercialIndustry: ResidentialType: Forensic Engineering+22 more

Hyalite Engineers, PLLC

Bozeman, MT

Hyalite Engineers, PLLC is a full-service engineering firm serving clients throughout Montana, the Dakotas, Idaho, and surrounding states. The team brings decades of combined experience in civil, structural, and environmental engineering, as well as land surveying, delivering projects across municipal, land development, structural, and surveying disciplines.

Website1 officeUpdated Jun 2026

Service detail: Municipal Engineering

Service: Municipal EngineeringService: Land DevelopmentService: Structural EngineeringIndustry: GovernmentIndustry: Land DevelopmentType: Civil Engineering+13 more

Hydrometrics, Inc.

Helena, MT

Empowering Environmental Responsibility

WebsitePhone3 officesUpdated Jun 2026

Service detail: Civil & Environmental Engineering

Service: Civil & Environmental EngineeringService: Water Resources & HydrogeologyService: Mine Permitting & ComplianceIndustry: GovernmentIndustry: MiningType: Environmental Engineering+8 more

Kennedy/Jenks Consultants, Inc.

San Francisco, CA

Tailored Solutions for Transmission and Conveyance Projects

Website34 offices13 projects2 leaders9 credentialsUpdated Jun 2026

Project: EchoWater Project Site Preparation

Service: Air QualityService: MACT compliance review and plan developmentService: BACT reviewIndustry: WastewaterIndustry: Water SupplyType: Civil Engineering+38 more

NCI Engineering Co.

Great Falls, MT

Engineers, Planners, Designers, Surveyors

Website3 offices5 projectsSize Estimate: 50 employeesUpdated Jun 2026

Project: Upper/Lower River Road Phase 4

Service: PlanningService: Master PlanningService: Preliminary Engineering ReportsIndustry: GovernmentIndustry: UtilitiesType: Civil Engineering+20 more

Pioneer Technical Services, Inc.

Butte, MT

Forging a bright and sustainable future together.

WebsitePhone1 office6 projects3 leaders10 credentialsFounded 1992

Project: Prickly Pear Creek Realignment Project

Service: EnvironmentalService: Site Assessment and InvestigationService: Remediation Design and Construction ManagementIndustry: Environmental & RemediationIndustry: MiningType: Environmental Engineering+43 more

TD&H Engineering

Great Falls, MT

A Full-Service Consulting Engineering Firm

Website9 offices8 projects5 leaders5 credentialsFounded 1965Size Estimate: 50-150 employees

Project: Great Falls Water Treatment Plant

Service: Civil EngineeringService: Site Civil Grading & Utility InfrastructureService: Stormwater Analysis & Drainage DesignIndustry: GovernmentIndustry: WastewaterType: Aviation Engineering+56 more

WGM Group, Inc.

Missoula, MT

Community Values. Inspired Futures.

WebsitePhone5 offices9 projects7 leaders3 credentialsFounded 1965

Project: Community Medical Development

Service: Civil EngineeringService: Water Main RehabilitationService: Site Utilities DesignIndustry: GovernmentIndustry: TransportationType: Civil Engineering+54 more

Water & Earth Technologies, Inc.

Severance, CO

Achieving Your Goals Through Innovation & Technology

WebsitePhone3 offices2 credentialsFounded 1997Updated Jun 2026

Service detail: Water Resource Engineering

Service: Water Resource EngineeringService: Hydrology and HydraulicsService: Erosion and Sediment ControlIndustry: Water ResourcesIndustry: Water SupplyType: Water / Wastewater Engineering+34 more

Water & Environmental Technologies, Inc.

Butte, MT

Founded on Practical Solutions.

WebsitePhone9 offices2 projects1 credentialsFounded 2000Size Estimate: 25-100 employees

Project: Parrot Site Superfund Cleanup, Butte

Service: Geoscience & Contaminant HydrogeologyService: Contaminant hydrogeologyService: Groundwater monitoringIndustry: Power GenerationIndustry: Oil & GasType: Civil Engineering+64 more

Woodard & Curran

Portland, ME

Clean Water, Safe Environment, Healthy Communities, Happy People

Website25 offices3 projects7 leadersFounded 1979Size Estimate: 1,300+ employeesUpdated Jun 2026

Project: Lead Testing in NYC Drinking Water Fountains

Service: WaterService: Water TreatmentService: Water ReuseIndustry: GovernmentIndustry: EducationType: Design-Build+15 more