Public engineering firm directory

Find engineering consulting firms by capability and location.

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Associated Construction Engineering Inc

Belgrade, MT

Transforming Communities Since 1987

WebsitePhone6 offices5 projects6 leadersFounded 1987Updated Jun 2026

Project: The Reed

Service: Mechanical Design ServicesService: HVACService: Air Handling SystemIndustry: CommercialIndustry: IndustrialType: MEP+52 more

Big Sky Acoustics

Helena, MT

Acoustical Design and Noise Control

WebsitePhone1 office1 projects2 leadersFounded 1999Updated Jun 2026

Project: Butte High School Auditorium

Service: Architectural AcousticsService: Architectural Acoustical DesignService: HIPAA Acoustical ComplianceIndustry: Arts & CultureIndustry: CommercialType: Acoustic Consulting+24 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

Cushing Terrell

Billings, MT

Imagine. Create. Improve.

WebsitePhone17 offices7 projects2 leaders4 credentialsFounded 1938

Project: Google Henderson Hub

Service: ArchitectureService: Historic PreservationService: Adaptive ReuseIndustry: CommercialIndustry: EducationType: Architecture & Engineering+38 more

DCI Engineers

Seattle, WA

Service. Innovation. Value.

WebsitePhone22 offices1 projects4 leadersFounded 1988Size Estimate: 350+ employees

Project: The Artise

Service: Structural EngineeringService: High-rise and performance-based designService: Seismic and adaptive renovationIndustry: CommercialIndustry: Multifamily ResidentialType: Structural Engineering+36 more

Elkhorn Commissioning Group

Bozeman, MT

Committed Building Performance Researchers

Website4 offices6 projects9 leaders8 credentialsSize Estimate: 1-9 employeesUpdated Jun 2026

Project: Leon Johnson Hall Energy Upgrade

Service: New Construction CommissioningService: Owner's Project Requirements (OPR) DevelopmentService: Design Document ReviewIndustry: CommercialIndustry: HealthcareType: Mechanical Engineering+24 more

Engineering Inc Mt

Concord, CA

Intelligent Infrastructure. Enduring Communities.

Website14 offices2 leadersFounded 2023Updated Jun 2026

Service detail: Transportation Engineering

Service: Civil EngineeringService: Transportation EngineeringService: Traffic EngineeringIndustry: MiningType: Civil Engineering+12 more

FourFront Design, Inc.

Rapid City, SD

Creating the built environment...for people!

WebsitePhone2 offices6 projects5 leaders3 credentialsFounded 1952

Project: Nashville National Cemetery Historic Lodge Addition and Renovation

Service: ArchitectureService: Schematic DesignService: Design DevelopmentIndustry: CommercialIndustry: RetailType: Architecture & Engineering+35 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

Robert Peccia & Associates

Helena, MT

Engineering Excellence

WebsitePhone5 officesFounded 1978Updated Jun 2026

Service detail: Airports

Service: AirportsService: Site CivilService: StructuresIndustry: AirportsIndustry: Highways & RoadsType: Aviation Engineering+14 more

Sanbell

Billings, MT

Intelligent Infrastructure. Enduring Communities.

WebsitePhone14 offices2 leaders2 credentialsFounded 1969Size Estimate: 201-500 employees

Service detail: Civil Engineering

Service: Civil EngineeringService: Site DevelopmentService: Grading and DrainageIndustry: Land DevelopmentIndustry: InfrastructureType: Civil Engineering+57 more

Stahly Engineering & Associates

Bozeman, MT

55 Years of Engineering Excellence

WebsitePhone6 offices3 projects25 leadersUpdated Jun 2026

Project: East Helena ALTA Survey

Service: Site Development & SubdivisionsService: Subdivisions Layout & DesignService: Municipal EngineeringIndustry: CommercialIndustry: GovernmentType: Civil Engineering+24 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

Triple Tree Engineering, Inc.

Helena, MT

Expert and innovative engineering services in a humble and honest manner with a strong commitment to quality and reliability

WebsitePhone1 office8 projects13 leadersSize Estimate: 11-50 employeesUpdated Jun 2026

Project: Port of Northern Montana Multimodal Hub

Service: Municipal EngineeringService: Water and Wastewater System DesignService: Infrastructure Funding and PlanningIndustry: GovernmentIndustry: Water SupplyType: Civil Engineering+19 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

Woith Engineering, Inc.

Great Falls, MT

Civil Engineers. Surveyors. Planning and Design. Proudly Serving Big Sky Country.

WebsitePhone4 offices6 projectsFounded 1978Updated Jun 2026

Project: Meriwether Crossing

Service: Land SurveyingService: Construction StakingService: Land Use Planning and PermittingIndustry: CommercialIndustry: ResidentialType: Civil Engineering+33 more