Public engineering firm directory

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120 Degreez

Los Angeles, CA

Redefining Technical Excellence

Website1 officeUpdated Jun 2026

Service detail: Mechanical Engineering

Service: Mechanical EngineeringService: Electrical EngineeringService: Plumbing EngineeringIndustry: CommercialIndustry: HospitalityType: MEP+7 more

154 Tech LLC

Santa Barbara, CA

Advanced systems engineering, geospatial intelligence, and end-to-end program lifecycle support

WebsitePhone1 office2 credentialsUpdated Jun 2026

Service detail: Technical Program Management

Service: Technical Program ManagementService: End-to-End Program ManagementService: Risk ManagementIndustry: DefenseIndustry: FederalType: Defense Engineering+28 more

1836 Engineering LLC

Fort Worth, TX

Founded in Texas, by Texans.

WebsitePhone2 offices13 projects1 leaders2 credentialsUpdated Jun 2026

Project: Terminal Development Program - San Antonio Airport

Service: Construction Engineering & InspectionService: Contract AdministrationService: Construction ManagementIndustry: Highways & RoadsIndustry: BridgesType: Civil Engineering+30 more

1CSDesign

San Diego, CA

Engineering Confidence From the Ground Up

WebsitePhone1 office1 leadersUpdated Jun 2026

Service detail: Structural Design

Service: Structural DesignService: Residential and Commercial Building DesignService: Structural Material EngineeringIndustry: ResidentialIndustry: CommercialType: Structural Engineering+13 more

2 Bravo Group LLC

We make sure buildings work

Website6 projectsUpdated Jun 2026

Project: VA Medical Center - New Construction Commissioning

Service: Building CommissioningService: Design and submittal reviewService: Functional performance testingIndustry: FederalIndustry: DefenseType: MEP+18 more

29E6, LLC

Beaufort, SC

Collaborative structural engineering for architects and contractors.

WebsitePhone1 office2 projectsFounded 2017Size Estimate: 1-9 employeesUpdated Jun 2026

Project: Hilton Head Island Recreation Center Enhancement & Expansion

Service: Commercial EngineeringService: Residential Structural EngineeringService: Industrial New ConstructionIndustry: CommercialIndustry: ResidentialType: Structural Engineering+9 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 projects8 leadersFounded 2005Updated Jun 2026

Project: O'Hare Terminal 3, Concourse L Expansion

Service: Highways, Roads, and StreetsService: Roadway geometryService: Drainage systemsIndustry: TransportationIndustry: Highways & RoadsType: Civil Engineering+29 more

2M Associates, LLC

Dallas, TX

Best Engineering Solutions to Build Your Dreams

WebsitePhone1 office5 projects2 credentialsFounded 2009Updated Jun 2026

Project: DFW Airport Southwest End Around Taxiway - Drainage Design

Service: Water and Wastewater DesignService: Hydrologic/hydraulic AnalysisService: ModelingIndustry: Water SupplyIndustry: WastewaterType: Civil Engineering+57 more

3 Phase Associates LLC

Chattanooga, TN

Electrical Engineering and Consulting Services

Website1 office2 credentialsFounded 2016Size Estimate: 10-49 employeesUpdated Jun 2026

Service detail: Electrical Engineering

Service: Electrical EngineeringService: Power System CalculationsService: Arc Flash AnalysisIndustry: UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+31 more

3 Rocks Engineering & Surveying

Cañon City, CO

Colorado Civil, Structural, & Land Surveying Experts

WebsitePhone3 offices9 projects2 leadersSize Estimate: 11-50 employeesUpdated Jun 2026

Project: Love's Travel Stop & RV Park Designs

Service: Civil EngineeringService: Residential and Commercial Site DevelopmentService: Oil and Gas Civil SupportIndustry: CommercialIndustry: ResidentialType: Civil Engineering+28 more

316 Product Development, LLC

Passionate and Creative

Website6 projects6 leadersSize Estimate: 1-9 employeesUpdated Jun 2026

Project: Vacuum Assisted Breast Biopsy Device

Service: Mechanical EngineeringService: Advanced Computer Aided Design (CAD)Service: Finite Element Analysis (FEA) and SimulationIndustry: Medical DevicesIndustry: Consumer ProductsType: Mechanical Engineering+34 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 credentialsUpdated Jun 2026

Service detail: Mechanical Engineering Consulting

Service: Mechanical Engineering ConsultingService: Finite Element AnalysisService: Analysis Program SetupIndustry: ManufacturingIndustry: IndustrialType: Mechanical Engineering+2 more

360 Energy Group

Chicago, IL

Your Energy Use Simplified

WebsitePhone1 office3 projectsUpdated Jun 2026

Project: Schaumburg Park District Energy Efficiency Study

Service: Program Design and ImplementationService: Public Sector ProgramsService: Geothermal Heat Pump DeploymentIndustry: GovernmentIndustry: UtilitiesType: Power & Utility Engineering+19 more

360 Engineering P.C.

Civil, Structural, and Construction Engineering Services

Website1 leadersFounded 2020Size Estimate: 1-9 employeesUpdated Jun 2026

Service detail: Structural Engineering

Service: Structural EngineeringService: Structural Evaluations of Existing BuildingsService: Structural Rehabilitation and Alteration DesignIndustry: CommercialIndustry: ResidentialType: Civil Engineering+23 more

360 Engineering, Inc.

Golden, CO

Engineering & Consulting for the Built Environment

WebsitePhone1 office12 projects6 leaders17 credentialsFounded 2003

Project: DEN B-East & C-East Concourse Expansions

Service: Mechanical & Plumbing EngineeringService: HVAC DesignService: Plumbing EngineeringIndustry: EducationIndustry: GovernmentType: Mechanical Engineering+15 more

3Bears Technical Services

Hixson, TN

Experts in Nuclear Operations and Waste Management Solutions

WebsitePhone1 office2 credentialsUpdated Jun 2026

Service detail: Engineering and Project Management

Service: Engineering and Project ManagementService: Mechanical EngineeringService: Electrical EngineeringIndustry: NuclearIndustry: Environmental & RemediationType: Environmental Engineering+31 more

3D Design & Engineering

Houston, TX

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

WebsitePhone1 office4 projects2 leaders3 credentialsUpdated Jun 2026

Project: Superbowl LI Cellular Network Modifications

Service: A&E ServicesService: Site Feasibility StudiesService: Erosion and Sediment Control PlanningIndustry: Oil & GasIndustry: TelecommunicationsType: Architecture & Engineering+30 more

3D Engineering Solutions, LLC

Cincinnati, OH

Measuring & Modeling Quality

WebsitePhone1 office2 credentialsFounded 2007Updated Jun 2026

Service detail: 3D Laser Scanning & Digitizing

Service: 3D Laser Scanning & DigitizingService: Short Range 3D Laser ScanningService: Long Range Laser ScanningIndustry: AerospaceIndustry: AutomotiveType: Materials Testing+28 more

3D Innovations, LLC

Honolulu, HI

Developing Ideas From Concept To Product

WebsitePhone1 office5 projectsFounded 2007Updated Jun 2026

Project: The BabyToon Silicone Baby Spoon

Service: Product Design & EngineeringService: 3D CAD Design & VisualizationService: 3D EngineeringIndustry: AerospaceIndustry: DefenseType: Mechanical Engineering+14 more

3RE Engineering LLC

Shawnee, KS

Specialized Electrical Engineering for Water & Wastewater Infrastructure

WebsitePhone1 office1 leaders5 credentialsSize Estimate: 1-5 employeesUpdated Jun 2026

Service detail: Electrical Design Service

Service: Electrical Design ServiceService: Power Distribution System DesignService: Equipment Specification & GroundingIndustry: WastewaterIndustry: Water SupplyType: Electrical Engineering+11 more

3T Design & Development LLC

Kansas City, MO

Air. Land. Water.

WebsitePhone1 office1 leadersFounded 2009Updated Jun 2026

Service detail: Air Quality and Environmental Compliance

Service: Air Quality and Environmental ComplianceService: Air Quality Permitting SupportService: Regulatory Review and ComplianceIndustry: TransportationIndustry: Water SupplyType: Civil Engineering+25 more

3U Technologies, LLC

Conroe, TX

Business consultant services engineered to withstand any condition

WebsitePhone1 office2 projects11 leaders10 publicationsFounded 1998

Project: Oregon State University Northwest National Marine Renewable Energy Center Support

Service: International Business ConsultingService: Market analysesService: Feasibility studiesIndustry: Oil & GasIndustry: TelecommunicationsType: Marine Engineering+38 more

3Vi, Inc.

San Ramon, CA

Engineering Excellence for a Sustainable Future

WebsitePhone3 offices1 leadersUpdated Jun 2026

Service detail: Systems Engineering & Integration

Service: Systems Engineering & IntegrationService: SCADA and Control SystemsService: Communications SystemsIndustry: TransitIndustry: RailType: Electrical Engineering+18 more

3jk Engineering Consultants Llc

Espanola, NM

Solving demanding technical problems through engineering, analysis, prototyping, and testing.

WebsitePhone1 office1 leadersUpdated Jun 2026

Service detail: Engineering and Design

Service: Engineering and DesignService: Custom Equipment Engineering and DesignService: Tooling, Jigs, and FixturesIndustry: Oil & GasIndustry: AerospaceType: Acoustic Consulting+30 more