Public engineering firm directory

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Ashley & Vance Engineering

San Luis Obispo, CA

Shaping the communities that we call home.

WebsitePhone9 offices7 projectsFounded 2005Size Estimate: 100-150 employeesUpdated Jun 2026

Project: Fountaingrove Passive House

Service: Structural EngineeringService: Cast-in-Place ConcreteService: Post-Tensioned ConcreteIndustry: ResidentialIndustry: Multifamily ResidentialType: Civil Engineering+31 more
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David Mason + Associates

St. Louis, MO

Exceptional Engineering. Innovative Construction Services. Dedicated to Our People.

WebsitePhone7 offices7 projectsFounded 1989Size Estimate: 100-250 employeesUpdated Jun 2026

Project: Jefferson National Expansion Memorial - Gateway Arch Grounds Renovations

Service: Civil EngineeringService: Structural EngineeringService: Survey and 3D ScanningIndustry: HealthcareIndustry: EducationType: Civil Engineering+20 more
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Dynotec Inc

Columbus, OH

Trusted to Build What's Next

WebsitePhone5 offices4 projects13 leaders1 credentialsFounded 1990

Project: Youngstown Air Reserve Station Hanger Renovation

Service: ArchitectureService: ADA ComplianceService: BIM ModelingIndustry: CommercialIndustry: FederalType: Architecture & Engineering+37 more
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HWH Architects Engineers Planners Inc.

Cleveland, OH

Advance Your Vision

WebsitePhone1 office6 projectsFounded 1908Updated Jun 2026

Project: Gas Turbine Technology Laboratory Air Heater Upgrade

Service: Engineering ServicesService: Civil Engineering ConsultingService: Master planningIndustry: IndustrialIndustry: ManufacturingType: Architecture & Engineering+39 more
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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
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O'Donnell & Naccarato

Philadelphia, PA

Local Expertise. National Reach.

WebsitePhone10 offices6 projects4 leaders4 credentialsFounded 1981

Project: Swarthmore College Sharples Dining Hall & Community Commons

Service: Structural EngineeringService: New ConstructionService: Adaptive Reuse & RenovationIndustry: CommercialIndustry: HealthcareType: Structural Engineering+22 more
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Somat Engineering, Inc.

Detroit, MI

Infrastructure Engineering Solutions

WebsitePhone8 offices8 projects2 leaders7 credentialsFounded 1986

Project: M-1 Rail (QLine)

Service: Geotechnical EngineeringService: Subsurface InvestigationService: Foundation DesignIndustry: TransportationIndustry: Highways & RoadsType: Geotechnical Engineering+49 more
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THP Limited

Cincinnati, OH

Delivering Innovative Design for Buildings and Structures

WebsitePhone3 offices6 projects70 leaders2 credentialsFounded 1973

Project: Andrew J. Brady Music Center

Service: Structural EngineeringService: Structural DesignService: AssessmentsIndustry: CommercialIndustry: EducationType: Architecture & Engineering+26 more
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Triumph Services LLC

Cleveland, OH

Engineering + Material Testing

WebsitePhone3 offices2 leaders1 credentialsUpdated Jun 2026

Service detail: Structural Engineering

Service: Structural EngineeringService: Mechanical EngineeringService: HVAC DesignIndustry: EducationIndustry: IndustrialType: MEP+21 more
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Wiss, Janney, Elstner Associates, Inc.

Northbrook, IL

Solutions for the Built World

WebsitePhone30 offices5 projects5 credentials5 publicationsFounded 1956

Project: Washington Monument

Service: Structural EngineeringService: Bridge EngineeringService: Heavy Movable StructuresIndustry: GovernmentIndustry: TransportationType: Architecture & Engineering+54 more
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