Public engineering firm directory

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ARM Group LLC

Hummelstown, PA

Precise. Responsive. Solutions.

WebsitePhone1 office1 projects8 credentialsFounded 1998Size Estimate: 250-500 employees

Project: Annapolis Landfill Solar

Service: Civil Engineering & Land SurveyingService: Site Planning & EntitlementService: Site Plan DesignIndustry: CommercialIndustry: RetailType: Automation & Controls+52 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

Herbert, Rowland & Grubic, Inc.

Harrisburg, PA

Engineering | Planning | Infrastructure Solutions

Website9 offices7 leaders3 credentialsFounded 1962Size Estimate: 400+ employeesUpdated Jun 2026

Service detail: Municipal Engineering

Service: Municipal EngineeringService: Municipal RepresentationService: Capital Improvement Planning & DesignIndustry: GovernmentIndustry: FederalType: Civil Engineering+96 more

Mueser Rutledge Consulting Engineers

New York, NY

Built on firm foundations

WebsitePhone3 offices8 projects11 leaders16 credentials5 publications

Project: One World Trade Center

Service: Geotechnical EngineeringService: Subsurface InvestigationsService: Earthquake EngineeringIndustry: BridgesIndustry: CommercialType: Geotechnical Engineering+41 more

Multi Lynx Companies Inc

Pittsburgh, PA

Multidisciplinary Engineering, Project Management & Business Technology Services

WebsitePhone1 office3 projects2 leadersUpdated Jun 2026

Project: Facility Sorting and Distribution Center

Service: Engineering ServicesService: Civil EngineeringService: Geotechnical EngineeringIndustry: CommercialIndustry: ResidentialType: Civil Engineering+24 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