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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120 Degreez

Los Angeles, CA

Redefining Technical Excellence

Website1 officeUpdated Jun 2026
Service: Mechanical EngineeringService: Electrical EngineeringIndustry: CommercialType: MEP+9 more

20/10 Engineering Group, LLC

Sustainable Designs | Better Engineering Vision

Website9 projectsUpdated Jun 2026
Service: Mechanical, Electrical, and Plumbing EngineeringService: HVAC and Climate Control SystemsIndustry: EducationType: MEP+28 more

29E6, LLC

Beaufort, SC

Collaborative structural engineering for architects and contractors.

WebsitePhone1 office2 projects
Service: Commercial EngineeringService: Residential Structural EngineeringIndustry: CommercialType: Structural Engineering+11 more

2IM Group, LLC

Chicago, IL

2IM Group, LLC is a Chicago-based civil, environmental, and transportation engineering practice. Now part of MacKay, it continues to deliver technical solutions across highways, roads, streets, aviation, rail, transit, utilities, and stormwater management systems while offering expanded resources and broader geographic reach.

WebsitePhone1 office5 projects
Service: Highways, Roads, and StreetsService: Roadway geometryIndustry: TransportationType: Civil Engineering+31 more

316 Product Development, LLC

Passionate and Creative

Website6 projects6 leadersSize Estimate: 1-9 employees
Service: Mechanical EngineeringService: Advanced Computer Aided Design (CAD)Industry: Medical DevicesType: Mechanical Engineering+36 more

333 Engineering Services PLLC

Porter, TX

333 Engineering Services PLLC provides specialized consulting mechanical engineering services to clients primarily in the Houston, Texas region. It delivers finite element analysis and structural assessment solutions to support complex industrial and manufacturing design requirements.

Website1 office1 leaders2 credentials
Service: Mechanical Engineering ConsultingService: Finite Element AnalysisIndustry: ManufacturingType: Mechanical Engineering+4 more

3Bears Technical Services

Hixson, TN

Experts in Nuclear Operations and Waste Management Solutions

WebsitePhone1 office2 credentials
Service: Engineering and Project ManagementService: Mechanical EngineeringIndustry: NuclearType: Environmental Engineering+33 more

3D Design & Engineering

Houston, TX

Innovation, Integrity & Quality - All of your A&E, Surveying and Utility Locating needs under one roof.

WebsitePhone1 office4 projects
Service: A&E ServicesService: Site Feasibility StudiesIndustry: Oil & GasType: Architecture & Engineering+32 more

3D Innovations, LLC

Honolulu, HI

Developing Ideas From Concept To Product

WebsitePhone1 office5 projects
Service: Product Design & EngineeringService: 3D CAD Design & VisualizationIndustry: AerospaceType: Mechanical Engineering+16 more

3RE Engineering LLC

Shawnee, KS

Specialized Electrical Engineering for Water & Wastewater Infrastructure

WebsitePhone1 office1 leaders
Service: Electrical Design ServiceService: Power Distribution System DesignIndustry: WastewaterType: Electrical Engineering+13 more

3U Technologies, LLC

Conroe, TX

Business consultant services engineered to withstand any condition

WebsitePhone1 office2 projects
Service: International Business ConsultingService: Market analysesIndustry: Oil & GasType: Marine Engineering+40 more

4D Systems

Flint, MI

The future of manufacturing is digital. Are you ready?

WebsitePhone3 offices5 credentials
Service: Controls EngineeringService: Control System IntegrationIndustry: ManufacturingType: Automation & Controls+25 more

4D Tech Solutions, LLC

Fairmont, WV

Mission-Driven Design and Development

WebsitePhone1 office5 projects
Service: Technology DevelopmentService: MEMS-Mirror LiDAR SystemsIndustry: DefenseType: Aerospace Engineering+21 more

4M Engineering

Specialized civil and structural engineering services for bridges and infrastructure projects.

Website1 projectsUpdated Jun 2026
Service: Temporary Works and Shoring DesignService: Bridge FalseworkIndustry: BridgesType: Civil Engineering+24 more

5D Architecture & Engineering, PLLC

Lynbrook, NY

Full-Service Architecture & Engineering Design

WebsitePhone1 office9 projects
Service: Architectural DesignService: Programming and Master PlanningIndustry: ResidentialType: Architecture & Engineering+24 more

7NT Enterprises, LLC

Miamisburg, OH

Proper Execution with Precision

WebsitePhone1 office9 projects
Service: Drilling ServicesService: Rock Coring and Soil SamplingIndustry: WastewaterType: Geotechnical Engineering+21 more

A D Marble Co Inc

King of Prussia, PA

Environmental, Cultural, and Water Resources Engineering

Website4 offices5 leadersUpdated Jun 2026
Service: Environmental EngineeringService: Environmental Clearance and PermittingIndustry: FederalType: Environmental Engineering+16 more

A Squared Plus Engineering Support Group, LLC

Finksburg, MD

A Squared Plus Engineering Support Group, LLC (A2+ESG) is an engineering practice that specializes in mechanical, electrical, plumbing, and information transportation system design. It delivers planning, engineering support, system analysis, and inspections for commercial, residential, industrial, and institutional facilities, including specialized experience in public safety and correctional environments.

WebsitePhone1 office11 projects
Service: MEP DesignService: Sustainable DesignIndustry: ResidentialType: MEP+27 more

A&A Engineering

Toledo, OH

Innovative, Trusted Structural Engineering Since 1996

WebsitePhone1 office11 leaders
Service: Core StructuresService: Metal BuildingsIndustry: CommercialType: Civil Engineering+26 more

A&B Foundry, Machining, and Fabrications

Franklin, OH

Engineering Excellence + Inspiring Innovation

WebsitePhone1 officeUpdated Jun 2026
Service: CastingsService: Air Set MoldingIndustry: AerospaceType: Industrial Engineering+32 more

A-Tech/Northwest, Inc.

Get an unbiased answer! Our only business is Roof Consulting

Website10 credentialsFounded 1976Updated Jun 2026
Service: Roof ConsultingService: Visual Roof InspectionsIndustry: GovernmentType: Materials Testing+16 more

A.M. Engineering

Elko, NV

Civil Engineering, Surveying, and Project Management Services in Nevada

WebsitePhone2 offices1 projects
Service: Civil EngineeringService: Streets and Highway DesignIndustry: GovernmentType: Civil Engineering+47 more

A.M.I. Engineering LLC

Miami, FL

Providing Engineering Solutions for Sustainable Infrastructure

WebsitePhone1 office4 projects
Service: Transportation InfrastructureService: System Planning and AnalysisIndustry: AirportsType: Civil Engineering+36 more

A.P. Consulting Engineers, DPC

Elmont, NY

MEP, Lighting, Energy, and Life Safety Engineering

WebsitePhone2 offices8 credentials
Service: MEP ServicesService: Mechanical DesignIndustry: Arts & CultureType: MEP+20 more