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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Civil & Environmental Consultants, Inc.

Pittsburgh, PA

We Own It.

WebsitePhone14 offices9 leaders2 credentialsFounded 1989Size Estimate: 1,500 employees

Service detail: Civil Engineering

Service: Air QualityService: Civil EngineeringService: One Of Cec's Four Founding PracticesIndustry: ManufacturingIndustry: MiningType: Civil Engineering+31 more

Cosmos Technologies, Inc.

Pittsburgh, PA

Innovation for the Future

WebsitePhone5 officesFounded 1998Updated Jun 2026

Service detail: Civil Site Design & Development

Service: Civil Site Design & DevelopmentService: Site PlanningService: Design From Concept Through Construction AdministrationIndustry: GovernmentIndustry: Water SupplyType: Civil Engineering+36 more

DESMAN

Boston, MA

Client-Focused Parking Solutions

WebsitePhone9 offices5 projects3 leaders3 credentialsFounded 1973

Project: Ft. Duquesne and Sixth Parking Garage Facade and Renovation

Service: Parking ConsultingService: Supply and Demand StudiesService: Concept PlanningIndustry: EducationIndustry: HealthcareType: Structural Engineering+30 more

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

H F Lenz Co

Johnstown, PA

Trusted. Experienced. Multidisciplined.

Website5 offices11 leaders2 credentialsFounded 1946Updated Jun 2026

Service detail: Energy Services

Service: Civil EngineeringService: CommissioningService: Communications EngineeringIndustry: Arts & CultureIndustry: AviationType: Civil Engineering+31 more

HEAPY Engineering, Inc.

Dayton, OH

Engineering Sustainability Commissioning

WebsitePhone8 offices5 leaders2 credentialsFounded 1945Updated Jun 2026

Service detail: Mechanical, Electrical, and Plumbing Engineering

Service: Mechanical, Electrical, and Plumbing EngineeringService: Lighting DesignService: Technology DesignIndustry: HealthcareIndustry: EducationType: MEP+26 more

Larson Design Group, Inc.

Williamsport, PA

National Presence. Hyper-Local Focus.

WebsitePhone18 offices4 leadersFounded 1986Updated Jun 2026

Service detail: Civil Engineering

Service: Architecture & Interior DesignService: Civil EngineeringService: Site/Land DevelopmentIndustry: CommercialIndustry: EducationType: Architecture & Engineering+78 more

Leonardo Technologies, Inc.

Saint Clairsville, OH

Professional Engineering Services

WebsitePhone6 offices3 projects3 publicationsFounded 2001Updated Jun 2026

Project: Wyoming CCUS Study

Service: Engineering Analysis & AssessmentService: Engineering and Economic Cost AnalysisService: Energy System Modeling and Data AnalysisIndustry: Power GenerationIndustry: Oil & GasType: Power & Utility Engineering+10 more

Mackin Engineering

Pittsburgh, PA

Civil engineering, transportation, land development, and facilities consulting

WebsitePhone4 offices6 projectsFounded 1960Updated Jun 2026

Project: Leechburg Bridge Inspection

Service: Transportation EngineeringService: Structural InspectionService: Structural Engineering DesignIndustry: TransportationIndustry: Highways & RoadsType: Civil Engineering+22 more

McKinley Architecture and Engineering

Wheeling, WV

Delivering successful projects through experience and innovation.

WebsitePhone7 offices5 credentialsUpdated Jun 2026

Service detail: Architecture

Service: ArchitectureService: EngineeringService: Structural engineeringIndustry: EducationIndustry: HealthcareType: Architecture & Engineering+20 more

Middough Inc.

Cleveland, OH

Engineering Project Solutions

Website4 offices10 projects29 credentialsFounded 1950Updated Jun 2026

Project: No. 4 BOF Gas Cleaning System

Service: Planning & ConsultingService: ConsultingService: PlanningIndustry: AgricultureIndustry: ChemicalsType: Architecture & Engineering+22 more

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

R2O Consulting, LLC

Cleveland, OH

R2O Consulting, LLC is a Cleveland-based engineering and consulting firm founded in 2017 that delivers infrastructure planning, water resources, and environmental services to public utilities, airports, developers, and contractors. Its team of approximately 20 professionals integrates hydraulic and hydrologic modeling, GIS analysis, asset management, and environmental compliance services across projects focused on aging infrastructure rehabilitation, water resource protection, and regulatory planning. R2O operates from offices in Cleveland, Pittsburgh, Detroit, Denver, Columbus, and Cincinnati.

WebsitePhone6 officesFounded 2017Size Estimate: 20 employeesUpdated Jun 2026

Service detail: Infrastructure Planning and Management

Service: Infrastructure Planning and ManagementService: Capital Program PlanningService: Asset ManagementIndustry: Water SupplyIndustry: Stormwater & Flood ControlType: Civil Engineering+24 more

RS&H

Jacksonville, FL

Creating Tomorrow, Together.

Website74 offices3 leaders2 credentialsFounded 1941Updated Jun 2026

Service detail: Architecture

Service: ArchitectureService: Interior DesignService: Landscape ArchitectureIndustry: AerospaceIndustry: AviationType: Architecture & Engineering+25 more

Resource International, Inc.

Columbus, OH

Your Entire Project Life Cycle

WebsitePhone8 offices9 projects1 leaders7 credentialsFounded 1973

Project: Blueprint Clintonville Professional Construction Management Services

Service: Transportation EngineeringService: Pavement Design & EngineeringService: Roadway DesignIndustry: EducationIndustry: HealthcareType: Civil Engineering+33 more

The Mannik & Smith Group, Inc.

Toledo, OH

Technical Skill. Creative Spirit.

Website3 offices8 projects4 leaders2 credentialsFounded 1955Size Estimate: 50-200 employees

Project: Waterfront Walkway Seawall

Service: Civil EngineeringService: Site DevelopmentService: Stormwater Management & Green InfrastructureIndustry: TransportationIndustry: GovernmentType: Civil Engineering+59 more

Thermo Systems LLC

East Windsor, NJ

A Premier Systems Integration Partner

WebsitePhone31 offices8 projects2 credentialsFounded 1998Updated Jun 2026

Project: Catalent Steam Humidifier Addition

Service: Automation and Control SystemsService: Controls for Energy and Industrial UtilitiesService: Building Automation Systems (BAS)Industry: Data CentersIndustry: Mission Critical FacilitiesType: Automation & Controls+31 more

Toole Design

Silver Spring, MD

Groundbreaking Work That Moves People

Website18 offices4 projects4 leadersFounded 2003Size Estimate: 300-500 employeesUpdated Jun 2026

Project: AASHTO Guide for the Development of Bicycle Facilities

Service: EngineeringService: Conceptual DesignService: Construction AdministrationIndustry: GovernmentIndustry: FederalType: Civil Engineering+40 more

Trans Associates Engineering Consultants Inc

Pittsburgh, PA

Small Firm Client Focus, Large Firm Capability

WebsitePhone3 offices5 projects1 leadersUpdated Jun 2026

Project: Pennsylvania Turnpike Truck Parking Study

Service: Transportation PlanningService: Funding ApplicationsService: NEPA Coordination and Document PreparationIndustry: TransportationIndustry: UtilitiesType: Transportation Engineering+36 more

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