Public engineering firm directory

Find engineering consulting firms by capability and location.

Search engineering firm profiles built for buyers who need a shortlist, not a sales pitch.

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Associated Construction Engineering Inc

Belgrade, MT

Transforming Communities Since 1987

WebsitePhone6 offices5 projects
Service: Mechanical Design ServicesService: HVACIndustry: CommercialType: MEP+54 more

Big Sky Acoustics

Helena, MT

Acoustical Design and Noise Control

WebsitePhone1 office1 projects
Service: Architectural AcousticsService: Architectural Acoustical DesignIndustry: Arts & CultureType: Acoustic Consulting+26 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 projects
Service: Hydrology and HydraulicsService: Bridge Opening Analysis and DesignIndustry: RailType: Civil Engineering+20 more

Cushing Terrell

Billings, MT

Imagine. Create. Improve.

WebsitePhone17 offices7 projects
Service: ArchitectureService: Historic PreservationIndustry: CommercialType: Architecture & Engineering+40 more

DCI Engineers

Seattle, WA

Service. Innovation. Value.

WebsitePhone22 offices1 projects
Service: Structural EngineeringService: High-rise and performance-based designIndustry: CommercialType: Structural Engineering+38 more

Elkhorn Commissioning Group

Bozeman, MT

Committed Building Performance Researchers

Website4 offices6 projects9 leaders
Service: New Construction CommissioningService: Owner's Project Requirements (OPR) DevelopmentIndustry: CommercialType: Mechanical Engineering+26 more

Engineering Inc Mt

Concord, CA

Intelligent Infrastructure. Enduring Communities.

Website14 offices2 leadersFounded 2023
Service: Civil EngineeringService: Transportation EngineeringIndustry: MiningType: Civil Engineering+13 more

FourFront Design, Inc.

Rapid City, SD

Creating the built environment...for people!

WebsitePhone2 offices6 projects
Service: ArchitectureService: Schematic DesignIndustry: CommercialType: Architecture & Engineering+37 more

Hydrometrics, Inc.

Helena, MT

Empowering Environmental Responsibility

WebsitePhone3 officesUpdated Jun 2026
Service: Civil & Environmental EngineeringService: Water Resources & HydrogeologyIndustry: GovernmentType: Environmental Engineering+10 more

Robert Peccia & Associates

Helena, MT

Engineering Excellence

WebsitePhone5 officesFounded 1978
Service: AirportsService: Site CivilIndustry: AirportsType: Aviation Engineering+16 more

Sanbell

Billings, MT

Intelligent Infrastructure. Enduring Communities.

WebsitePhone14 offices2 leaders
Service: Civil EngineeringService: Site DevelopmentIndustry: Land DevelopmentType: Civil Engineering+59 more

Stahly Engineering & Associates

Bozeman, MT

55 Years of Engineering Excellence

WebsitePhone6 offices3 projects
Service: Site Development & SubdivisionsService: Subdivisions Layout & DesignIndustry: CommercialType: Civil Engineering+26 more

TD&H Engineering

Great Falls, MT

A Full-Service Consulting Engineering Firm

Website9 offices8 projects5 leaders
Service: Civil EngineeringService: Site Civil Grading & Utility InfrastructureIndustry: GovernmentType: Aviation Engineering+58 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 projects
Service: Municipal EngineeringService: Water and Wastewater System DesignIndustry: GovernmentType: Civil Engineering+21 more

Water & Environmental Technologies, Inc.

Butte, MT

Founded on Practical Solutions.

WebsitePhone9 offices2 projects
Service: Geoscience & Contaminant HydrogeologyService: Contaminant hydrogeologyIndustry: Power GenerationType: Civil Engineering+66 more

Woith Engineering, Inc.

Great Falls, MT

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

WebsitePhone4 offices6 projects
Service: Land SurveyingService: Construction StakingIndustry: CommercialType: Civil Engineering+35 more