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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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

ASI Industrial

Billings, MT

Build On Our Experience

Website1 office1 projectsUpdated Jun 2026

Project: KSU Grain Science Project

Service: Engineering & DesignService: Process EngineeringService: Civil Engineering & DraftingIndustry: AgricultureIndustry: IndustrialType: Process Engineering+14 more

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

Con'eer Engineering, Inc.

Billings, MT

Mechanical/Electrical Professional Engineers.

WebsitePhone1 office4 projects2 leaders6 credentialsFounded 1964

Project: Marathon Oil Operations Center

Service: Mechanical EngineeringService: HVAC Systems DesignService: Plumbing Systems DesignIndustry: CommercialIndustry: RetailType: MEP+28 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

Dynamic Analysis Engineering Consulting Inc

Billings, MT

Forensic & Structural Engineers

Website1 officeSize Estimate: 1-4 employeesUpdated Jun 2026

Service detail: Structural Engineering

Service: Structural EngineeringService: Residential Structural DesignService: Commercial Structural DesignIndustry: ResidentialIndustry: CommercialType: Structural Engineering+10 more

EEC

Billings, MT

All under one roof. All working together.

WebsitePhone1 office3 projects3 leadersFounded 1998Size Estimate: 30+ employees

Project: MH EBY - Sales & Service Center

Service: ArchitectureService: Civil and Structural EngineeringService: Civil engineeringIndustry: CommercialIndustry: IndustrialType: Architecture & Engineering+11 more

Electrical Consultants, Inc.

Billings, MT

Engineering with Distinction

WebsitePhone1 office3 projects17 leadersFounded 1985Size Estimate: 1,200+ employees

Project: Roseland BESS

Service: Transmission EngineeringService: Overhead and Underground TransmissionService: Land Survey and Construction StakingIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+36 more

Engineering Associates

Cody, WY

Engineering Wyoming.

WebsitePhone10 offices4 leadersFounded 1952Updated Jun 2026

Service detail: Civil Engineering

Service: Civil EngineeringService: Architectural EngineeringService: Environmental ReviewsIndustry: GovernmentIndustry: InfrastructureType: Civil Engineering+20 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

Essex Surveying

Billings, MT

Essex Surveying is a professional land surveying firm based in Billings, Montana, with additional offices in Red Lodge and Shepherd. Licensed in Montana, Wyoming, North Dakota, South Dakota, Idaho, Washington, and Alaska, and holding Certified Federal Surveyor (CFedS) credentials, Essex Surveying specializes in transportation and engineering design surveys, boundary, construction, route, GPS, and mine quality control surveys. The firm has significant project experience with the Montana Department of Transportation and the Alaska Department of Transportation, including highway widening, airport expansions, railroad surveys, and hydrographic work.

WebsitePhone3 offices2 leaders1 credentialsUpdated Jun 2026

Service detail: Transportation & Engineering Design Surveys

Service: Transportation & Engineering Design SurveysService: Right-of-Way SurveysService: Project ControlIndustry: TransportationIndustry: Highways & RoadsType: Land Surveying+11 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

JGA Architects Engineers Planners

Billings, MT

JGA Architects Engineers Planners is a full-service architectural, engineering, and planning firm based in Billings, Montana, with more than 50 years of experience. JGA serves clients throughout Montana, Wyoming, and North Dakota, delivering comprehensive design services for commercial, educational, healthcare, government, and residential projects across every stage from concept development and planning through construction administration. The firm specializes in ADA-compliant design and construction and holds an A+ rating from the Better Business Bureau.

WebsitePhone1 office5 projects1 credentialsUpdated Jun 2026

Project: Montana State University - Billings

Service: New Building ConstructionService: Additions and RenovationsService: ADA-Compliant Design and ConstructionIndustry: HealthcareIndustry: EducationType: Architecture & Engineering+6 more

Krivonen Structural Engineers

Billings, MT

Strong solutions for all structural challenges

WebsitePhone1 office8 projectsFounded 1992Updated Jun 2026

Project: Ben Steele Middle School

Service: Agricultural Structural DesignService: Barns & SilosService: Equipment BridgesIndustry: AgricultureIndustry: CommercialType: Structural Engineering+54 more

Performance Engineering

Billings, MT

Breaking New Ground in Engineering Excellence

WebsitePhone1 office6 projects5 leaders3 credentialsUpdated Jun 2026

Project: Intermountain Health - West End Campus

Service: Civil EngineeringService: Site Development DesignService: Infrastructure DesignIndustry: GovernmentIndustry: Water ResourcesType: Civil Engineering+20 more

SK Geotechnical

Billings, MT

SK Geotechnical is a geotechnical engineering and materials testing firm based in Billings, Montana, providing drilling services, dynamic pile testing, construction testing, and laboratory testing to public and private clients throughout the region. The firm has been a top-ranked geotechnical and materials consultant for the Montana Department of Transportation (MDT) and has delivered services on more than four dozen Montana highway projects in recent years, as well as federal highway projects for the Western Federal Lands Highway Division across Montana, Idaho, Oregon, Washington, and North Dakota.

WebsitePhone1 officeUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Drilling ServicesService: Dynamic Pile TestingIndustry: Highways & RoadsIndustry: BridgesType: Geotechnical Engineering+7 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

Toth and Associates

Springfield, MO

Full-service consulting engineering specializing in electric utility engineering, structural engineering, civil engineering, land surveying, and GIS.

WebsitePhone5 offices10 leaders1 credentialsFounded 2003Size Estimate: 150-250 employees

Service detail: Electrical Engineering

Service: Electrical EngineeringService: Electrical System PlanningService: Electrical Substation DesignIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Civil Engineering+38 more