Public engineering firm directory

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AED Energy Services

Wyomissing, PA

Designing America's Energy Lifelines

WebsitePhone4 offices9 leaders4 credentialsFounded 1989Updated Jun 2026

Service detail: Chemical and Process Design

Service: Chemical and Process DesignService: Documentation and AnalysisService: Specialized CalculationsIndustry: Oil & GasIndustry: PetrochemicalType: Chemical Engineering+64 more

ARM EnerTech Associates, LLC

Johnstown, PA

Precise. Responsive. Solutions.

WebsitePhone4 offices4 projects7 credentialsFounded 1976Updated Jun 2026

Project: Fresh Water Withdrawal Station

Service: Automation & Control ServicesService: Supervisory Control & Data Acquisition (SCADA)Service: Industrial Process ControlIndustry: ManufacturingIndustry: UtilitiesType: Automation & Controls+31 more

Ackenheil Engineers, Inc.

Pittsburgh, PA

Your project is our priority.

WebsitePhone1 office5 leaders1 credentialsFounded 1958Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Geotechnical investigationsService: Spread footing foundation designIndustry: BridgesIndustry: Highways & RoadsType: Geotechnical Engineering+24 more

Advantus Engineers

Pittsburgh, PA

Advantus Engineers is a Pittsburgh-based engineering consulting practice founded in 2004, specializing in building commissioning, sustainability consulting, MEP assessments, construction quality assurance, and environmental compliance. It serves public, institutional, and commercial clients across the Pittsburgh region. Over more than two decades, the practice has supported LEED certifications, water quality programs, and on-call MEP engineering for clients including the Pittsburgh Water and Sewer Authority and the David L. Lawrence Convention Center.

WebsitePhone1 office7 projects9 leaders3 credentialsFounded 2004

Project: Western Butler County Authority Administration Building

Service: Building CommissioningService: Design and Submittal AnalysisService: Controls and Checklist FormulationIndustry: GovernmentIndustry: CommercialType: MEP+40 more

Allen + Shariff

Columbia, MD

Engineering Together

WebsitePhone7 offices3 projects9 leadersUpdated Jun 2026

Project: Wallops Mission Operations Command Center

Service: MEP EngineeringService: Mechanical EngineeringService: Electrical EngineeringIndustry: CommercialIndustry: ResidentialType: MEP+34 more

Ammonite Resources

Houston, TX

Ammonite Resources provides geotechnical and economic advisory services for the petroleum and mineral industries worldwide. Established in 1982, it assists clients with investment due diligence, strategic planning, international contract negotiations, corporate finance, and acquisitions and divestitures. It is headquartered in Connecticut with a network of associate offices across the United States, Canada, and the United Kingdom.

Website9 offices25 leadersFounded 1982Updated Jun 2026

Service detail: Investment Due Diligence

Service: Investment Due DiligenceService: First-Pass Opportunity ReviewsService: Joint Venture Evaluation and RepresentationIndustry: Oil & GasIndustry: MiningType: Geotechnical Engineering+19 more

Aterra Solutions

Ambler, PA

Dams, Levees, Severe Flooding, and Geotechnical Services

WebsitePhone2 offices13 projects1 leadersUpdated Jun 2026

Project: Inundation Mapping, Hazard Assessments and Emergency Action Plans for Forest Service Dams

Service: Dam Engineering & HydropowerService: Flooding Support for Nuclear IndustryService: Levee Engineering & CertificationIndustry: NuclearIndustry: Water ResourcesType: Geotechnical Engineering+19 more

Atlantic Engineering Services

Pittsburgh, PA

Bringing Architectural Visions to Life

WebsitePhone3 offices8 projects5 leaders2 credentials3 publications

Project: Pittsburgh Athletic Association Renovation

Service: Structural EngineeringService: Steel DesignsService: ConcreteIndustry: Senior LivingIndustry: GovernmentType: Structural Engineering+38 more

Barton Associates Inc

York, PA

We Make Buildings Work

WebsitePhone6 offices3 projects94 leadersFounded 1968Size Estimate: 100+ employees

Project: Price Auditorium at Lock Haven University

Service: MEP EngineeringService: Mechanical EngineeringService: Electrical EngineeringIndustry: EducationIndustry: HealthcareType: MEP+14 more

Buchart Horn, Inc.

York, PA

Shaping the built environment with precision, creativity, and purpose since 1945

WebsitePhone9 offices6 projects4 leadersFounded 1945Size Estimate: 100-500 employees

Project: I-40/I-240 Interchange Improvements, Memphis, TN

Service: Water Resources EngineeringService: Wastewater treatment plant engineeringService: Water distribution and collection systemsIndustry: Water ResourcesIndustry: WastewaterType: Architecture & Engineering+41 more

CSD Engineers, LLC

Pittsburgh, PA

Engineering & Management Solutions

WebsitePhone1 office2 leaders4 credentialsFounded 2008Updated Jun 2026

Service detail: Project Management and Controls

Service: Project Management and ControlsService: Project ManagementService: Project Controls and SchedulingIndustry: Oil & GasIndustry: PetrochemicalType: Civil Engineering+37 more

Century 3 Inc.

Greer, SC

Century 3 Inc. (C3) is an industrial engineering and construction company founded in 1977 in Greer, SC. C3 delivers engineering design, procurement, self-perform industrial construction, construction management, facility relocation, and maintenance services to clients in the food and beverage, pharmaceutical and life science, advanced manufacturing, automotive, chemical, high-tech, mission-critical, and general industrial markets. With 1,500 or more engineering and construction professionals, C3 holds professional engineering licenses and unlimited general contractor licenses throughout the United States, as well as trade-specific electrical, mechanical, plumbing, and piping contractor licenses. US offices are in Greer SC, Augusta GA, Pittsburgh PA, and Phoenix AZ, with additional international entities in China and Europe.

Website4 offices6 leadersFounded 1977Size Estimate: 1,500+ employeesUpdated Jun 2026

Service detail: Engineering Design

Service: Engineering DesignService: Self-Perform Industrial ConstructionService: ProcurementIndustry: Food & BeverageIndustry: PharmaceuticalType: Industrial Engineering+12 more

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

Claitman Engineering Associates, Inc

Pittsburgh, PA

Claitman Engineering Associates is a full-service MEP engineering firm established in 1965, providing mechanical, plumbing, fire protection, and electrical engineering services throughout Pennsylvania, Ohio, Maryland, West Virginia, and Virginia. With more than 50 years of experience, the team delivers solutions across a wide range of building markets including healthcare, education, corporate, retail, manufacturing, and hospitality.

WebsitePhone1 officeFounded 1965Updated Jun 2026

Service detail: HVAC Design

Service: HVAC DesignService: Central chiller and boiler plantsService: General space HVAC and ventilation systemsIndustry: HealthcareIndustry: EducationType: MEP+27 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

D'Appolonia Engineers

Pittsburgh, PA

We create foundations for the future.

WebsitePhone1 office13 credentialsFounded 1956Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Foundation DesignService: Site Geotechnical ExplorationIndustry: MiningIndustry: Electric UtilitiesType: Civil Engineering+38 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

Daedalus, Inc.

Pittsburgh, PA

Research, Design, and Engineering

WebsitePhone1 office11 projects4 leaders9 credentials1 publications

Project: Runway Lighting Product Lines

Service: ResearchService: User ResearchService: Ethnographic ResearchIndustry: HealthcareIndustry: LaboratoriesType: Mechanical Engineering+46 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

ECS

Asheville

YOUR GO-TO Engineering Consulting Partner

Website44 offices6 projects6 leadersFounded 1988Updated Jun 2026

Project: SK Innovation EV Battery Site

Service: GeotechnicalService: Subsurface ExplorationService: In-Situ TestingIndustry: CommercialIndustry: EducationType: Geotechnical Engineering+39 more

Erdman Anthony Holding Company Inc

Rochester, NY

We Are the Community That Builds Communities

WebsitePhone8 offices5 projects1 leaders3 credentialsFounded 1954

Project: PA Route 75 over Norfolk Southern Bridge Replacement

Service: Transportation EngineeringService: Bridge and Structure DesignService: Highway and Street DesignIndustry: BridgesIndustry: Highways & RoadsType: Civil Engineering+66 more

GAI Consultants, Inc.

Indianapolis, IN

Transforming Ideas Into Reality®

WebsitePhone5 offices24 leaders4 publicationsFounded 1958Updated Jun 2026

Service detail: Environmental Services

Service: Environmental ServicesService: Environmental Impact Analysis and NEPA DocumentationService: Permitting and Regulatory ComplianceIndustry: Power GenerationIndustry: Renewable EnergyType: Civil Engineering+44 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