Public engineering firm directory

Find engineering consulting firms by capability and location.

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50 States Engineering Corp.

Hackensack, NJ

Benefit from an innovative and diverse range of surveying and engineering experience.

WebsitePhone1 office7 projects3 leaders1 credentialsUpdated Jun 2026

Project: Admiration Foods Facility

Service: Land SurveyingService: Construction layout and stakeoutService: 3D laser scanningIndustry: TransitIndustry: RailType: Civil Engineering+28 more

AP Engineering & Consulting, Inc.

Greenfield, IN

AP Engineering & Consulting, Inc. (APEC) is a full-service geotechnical engineering, environmental consulting, compliance management, and construction materials testing firm based in Greenfield, Indiana. APEC's team of licensed professional engineers, geologists, and scientists delivers quality, efficient, and value-added solutions for commercial, residential, and municipal projects. Its INDOT-prequalified and AASHTO-certified in-house laboratory supports construction materials testing in accordance with ASTM and AASHTO standards.

WebsitePhone1 office3 credentialsUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Subsurface ExplorationsService: Soil BoringsIndustry: CommercialIndustry: RetailType: Geotechnical Engineering+37 more

Advanced Infrastructure Design, Inc.

Hamilton, NJ

Advanced Infrastructure Design, Inc. (AID) is a consulting engineering practice established in 1998. Headquartered in Hamilton, New Jersey, with an office in Philadelphia, Pennsylvania, it is staffed by licensed Professional Engineers, scientists, researchers, and technicians. The practice specializes in transportation infrastructure preservation, deploying advanced non-destructive testing (NDT) technologies to evaluate and design solutions for roads, bridges, tunnels, airports, substructures, foundations, and parking structures. It is led by President Mojgan Mohtashami, PhD, MBA.

Website2 offices1 leadersFounded 1998Size Estimate: 10-30 employeesUpdated Jun 2026

Service detail: Pavement Engineering

Service: Pavement EngineeringService: Comprehensive Non-Destructive Field TestingService: Functional LCMS AssessmentIndustry: GovernmentIndustry: TransportationType: Civil Engineering+57 more

Atane Consulting

New York, NY

Excel. Together.

WebsitePhone10 offices7 projects17 leaders17 credentialsUpdated Jun 2026

Project: Bloomingdale Road Reconstruction

Service: EngineeringService: Civil EngineeringService: Structural EngineeringIndustry: TransportationIndustry: Highways & RoadsType: Architecture & Engineering+33 more

Brierley Associates Corporation

Englewood, CO

Creating Space Underground

WebsitePhone20 offices4 projects6 leaders11 credentialsUpdated Jun 2026

Project: Champlain Hudson Power Express Trenchless Crossings

Service: Tunneling EngineeringService: Trenchless EngineeringService: Horizontal Directional Drilling (HDD)Industry: Water SupplyIndustry: WastewaterType: Geotechnical Engineering+20 more

C&C Consulting Engineers, LLC

Boston, MA

Civil, structural, and surveying engineering solutions for public infrastructure and private developments

WebsitePhone1 office3 projects1 leaders11 credentialsFounded 1930

Project: Quincy Approach Spans (Fore River Bridge)

Service: Bridge & Structural EngineeringService: Bridge DesignService: Bridge Inspection and RatingIndustry: TransportationIndustry: BridgesType: Civil Engineering+30 more

DACCO SCI, INC.

Columbia, MD

Engineering Solutions for a Sustainable Future

WebsitePhone1 office8 projects1 leaders5 credentialsFounded 1988

Project: Service Line Material Identification

Service: Corrosion EngineeringService: Cathodic Protection System Design and InstallationService: Cathodic Protection System EvaluationIndustry: Water SupplyIndustry: RailType: Forensic Engineering+42 more

DHDC Engineering Consulting Services, Inc.

Columbus, OH

Providing cost-effective solutions to your engineering needs.

WebsitePhone2 offices15 projects4 leaders7 credentialsSize Estimate: 20+ employees

Project: City of Columbus Pump Station

Service: Geotechnical EngineeringService: Soil Borings and Subsurface InvestigationsService: Foundation, Retaining Structure, and Tunnel DesignIndustry: InfrastructureIndustry: TransportationType: Geotechnical Engineering+19 more

Dawn Underground Engineering, Inc.

Flemington, NJ

Tunnels and Underground Structures Consultants

WebsitePhone1 office18 projectsUpdated Jun 2026

Project: City Tunnel No. 3

Service: Geotechnical EngineeringService: Subsurface Investigation ProgramsService: Geotechnical Data and Baseline ReportsIndustry: TunnelsIndustry: WastewaterType: Civil Engineering+19 more

Dulles Geotechnical and Materials Testing Services, Inc.

Chantilly, VA

Geotechnical engineering, construction inspection, materials testing, and software solutions

WebsitePhone4 offices10 projects7 credentialsFounded 2012Size Estimate: 70+ employees

Project: I-495 Express Lanes Northern Extension (I-495 NEXT)

Service: Geotechnical EngineeringService: Engineering Analysis and DesignService: Foundation DesignIndustry: Highways & RoadsIndustry: TransitType: Geotechnical Engineering+36 more

EXP

Brampton, ON

Multidisciplinary engineering, architecture, design and consulting services.

Website1 office6 projects3 leaders10 credentials5 publicationsFounded 1906

Project: Southwest Calgary Ring Road

Service: Architecture and DesignService: Architectural designService: Interior space planningIndustry: TransportationIndustry: TransitType: Architecture & Engineering+95 more

GSG Consultants, Inc.

Schaumburg, IL

Shaping the Midwest Since 1992

WebsitePhone2 offices2 leaders1 credentialsFounded 1992Size Estimate: 100-499 employees

Service detail: Environmental Engineering

Service: Environmental EngineeringService: Natural ResourcesService: NEPA and Regulatory ComplianceIndustry: BridgesIndustry: EducationType: Civil Engineering+38 more

Gall Zeidler Consultants

Ashburn, VA

Innovative tunnel, geotechnical, and underground engineering solutions

WebsitePhone10 offices7 projects3 leaders7 credentialsUpdated Jun 2026

Project: Potomac River Tunnel

Service: Tunnel and Underground Engineering DesignService: Reference and Detailed DesignService: Design Concepts, Options and FeasibilityIndustry: TunnelsIndustry: TransitType: Civil Engineering+25 more

Geo-Advantec, Inc.

San Dimas, CA

Leading Geotechnical Consulting Firm

WebsitePhone1 office3 projects5 leaders7 credentialsFounded 2012

Project: City of Commerce Washington Boulevard Rehabilitation Project

Service: Geotechnical EngineeringService: Geotechnical Field ExplorationsService: Foundation Analysis & DesignIndustry: TransportationIndustry: GovernmentType: Geotechnical Engineering+30 more

GeoPentech

Irvine, CA

Innovative and Effective Solutions for Earth-Related Projects

Website1 office14 leadersFounded 2000Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Slope StabilityService: Landslide Evaluation and RepairIndustry: MiningIndustry: NuclearType: Civil Engineering+24 more

GeoStrata

Bluffdale, UT

Leaders in Engineering and Geoscience

WebsitePhone1 office9 credentialsFounded 1999Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Foundation Soils AssessmentService: Pavement DesignIndustry: CommercialIndustry: ResidentialType: Geotechnical Engineering+28 more

Geocomp

New York City, NY

Empowering Projects with Geostructural Expertise and Technology

Website1 office14 projects3 leaders16 credentials10 publicationsFounded 1982

Project: Central Artery/Tunnel

Service: Geotechnical MonitoringService: Bridge Geotechnical MonitoringService: Dam Geotechnical MonitoringIndustry: BridgesIndustry: TransportationType: Civil Engineering+60 more

Geotill Inc.

Fishers, IN

Geotechnical Engineering, Subsurface Exploration, Drilling, Materials Engineering, Construction Testing and Environmental Services

WebsitePhone1 office2 credentialsUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Foundation EngineeringService: Shallow and Mat Foundation DesignIndustry: GovernmentIndustry: Highways & RoadsType: Geotechnical Engineering+54 more

Goodrich Engineering LLC

Grand Junction, CO

Goodrich Engineering LLC is a geotechnical and mining engineering consultancy in Grand Junction, Colorado, with 40 years of geoscience and geoengineering experience. Services span soil and rock mechanics, foundation design, slope stability, rock mechanics, mining engineering, transportation and road engineering, geology, hydrology, and environmental consulting. An in-house soils and rock mechanics lab supports subsurface characterization and drilling program work for residential, commercial, and mining clients across Colorado, Utah, Texas, New Mexico, and Idaho.

WebsitePhone1 office1 leadersUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Foundations and Earth RetentionService: Slope Stability and Hazard AnalysisIndustry: MiningIndustry: Oil & GasType: Geotechnical Engineering+20 more

HBK Engineering, LLC

Chicago, IL

A Proven Leader in Utility Engineering

WebsitePhone29 offices6 credentialsFounded 1998Size Estimate: 900+ employeesUpdated Jun 2026

Service detail: Electrical Utility Infrastructure Design

Service: Electrical Utility Infrastructure DesignService: Transmission and distribution line designService: Substation designIndustry: Electric UtilitiesIndustry: Power GenerationType: Environmental Engineering+48 more

Halle's Engineering & Design, LLC

Akron, OH

Civil engineering services for public sector clients

Website1 office1 leaders1 credentialsFounded 2020Updated Jun 2026

Service detail: Transportation Engineering

Service: Transportation EngineeringService: Traffic ControlService: Pavement MarkingsIndustry: GovernmentIndustry: TransportationType: Civil Engineering+18 more

Harsini, Inc.

Boston, MA

Practical solutions to complex design and construction challenges

WebsitePhone2 offices1 leadersUpdated Jun 2026

Service detail: Structural Engineering Consulting

Service: Structural Engineering ConsultingService: BuildingsService: Underground StructuresIndustry: CommercialIndustry: IndustrialType: Design-Build+13 more

Hirani Engineering and Land Surveying D.P.C.

Hirani Engineering and Land Surveying D.P.C. is a New York engineering practice delivering construction management and inspection, structural engineering, civil and site engineering, monitoring and instrumentation, construction engineering, and land surveying services. It serves a broad public client base across New York State and New York City, including NYC Department of Design and Construction, DASNY, NYC Department of Transportation, the Port Authority of NY & NJ, and multiple MTA agencies covering NYC Transit, Metro-North Railroad, Long Island Rail Road, and Bridges & Tunnels.

Website11 projects3 credentialsUpdated Jun 2026

Project: JFK Airport Redevelopment Program

Service: Construction Management & InspectionService: Design and Construction SchedulingService: Cost Estimating and Value AnalysisIndustry: EducationIndustry: HealthcareType: Civil Engineering+62 more

LJB Inc.

Lima, OH

Improving the quality of life for the clients, communities and individuals we serve.

Website10 offices5 projects1 leaders4 credentialsFounded 1966Updated Jun 2026

Project: Woodland Avenue Pump Station Rehab

Service: Structural EngineeringService: Tilt-Up Concrete DesignService: Composite Bridge DesignIndustry: TransportationIndustry: Highways & RoadsType: Civil Engineering+45 more