Public engineering firm directory

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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

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

AEi Systems, Inc.

Centennial, CO

Analytical HEAVY Lifting

WebsitePhone2 offices9 publicationsFounded 1995Size Estimate: 1-25 employeesUpdated Jun 2026

Service detail: Worst-Case Circuit Analysis (WCCA)

Service: Worst-Case Circuit Analysis (WCCA)Service: Pre-WCCA design review and assessmentService: WCCA document reviewIndustry: ElectronicsIndustry: SpaceType: Electrical Engineering+38 more

ARUSI, LLC

Phoenix, AZ

Powering Your Vision With 35 Years of Experience

WebsitePhone1 office2 projects1 leadersFounded 1987Updated Jun 2026

Project: Sky Harbor International Airport Utility Services

Service: Utility Engineering, Coordination & ConsultingService: System StudiesService: Utility CoordinationIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+21 more

Allgeier, Martin and Associates, Inc.

Joplin, MO

It's not just business...it's personal.

WebsitePhone6 offices17 projects20 leaders39 credentialsFounded 1954

Project: Route 66 Bridge

Service: Civil EngineeringService: BridgesService: IntersectionsIndustry: GovernmentIndustry: WastewaterType: Civil Engineering+33 more

Alpha Engineering, Inc.

Indianapolis, IN

Innovative Power Solutions

WebsitePhone1 office3 leadersFounded 1979Updated Jun 2026

Service detail: Power Systems Engineering

Service: Power Systems EngineeringService: Substation EngineeringService: Line DesignIndustry: CommercialIndustry: EducationType: Electrical Engineering+22 more

Ampirical

Partnering with you to deliver innovative, reliable energy solutions that enhance lives and strengthen the grid.

Website3 projects1 credentialsSize Estimate: 250-500 employeesUpdated Jun 2026

Project: 230kV Transmission Line EPC

Service: Substation EngineeringService: Full physical, civil, structural, and P&C designService: Grounding, shielding, and lightning protectionIndustry: Electric UtilitiesIndustry: Power GenerationType: Automation & Controls+58 more

Atwell & Gent, P.A.

Starkville, MS

Client-focused, project-driven electrical engineering and consulting

WebsitePhone1 office1 projectsUpdated Jun 2026

Project: Mary Haughton 46 kV Transmission Line

Service: Power Systems EngineeringService: Transmission Line DesignService: Substation DesignIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+8 more

Bath Group, LLC

Corpus Christi, TX

A quality-conscious engineering practice dedicated to achieving client expectations through responsible engineering

Website3 offices4 leaders12 credentialsFounded 1957Size Estimate: 50+ employeesUpdated Jun 2026

Service detail: Electrical Engineering

Service: Electrical EngineeringService: Low Voltage SystemsService: Medium Voltage SystemsIndustry: CommercialIndustry: EducationType: Electrical Engineering+25 more

Beta Engineering

Pineville, LA

Beta Engineering is a high-voltage EPC firm that designs, procures, and constructs substation and transmission line projects across the US for utilities, renewable developers, data centers, and industrial customers. Founded in 1975 as part of the Crest Industries family of companies, Beta delivers turnkey EPC solutions and factory-built substations under its Agile by Beta product line, and has helped clients connect more than 6,000 MW of renewable energy to the grid.

WebsitePhone1 officeFounded 1975Updated Jun 2026

Service detail: Turnkey EPC Substations

Service: Turnkey EPC SubstationsService: Factory-Built SubstationsService: Engineering ServicesIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+4 more

Blair, Church & Flynn Consulting Engineers

Clovis, CA

Service. Quality. Integrity.

WebsitePhone6 offices3 leaders5 credentialsFounded 1958Updated Jun 2026

Service detail: Planning, Permitting & Consulting

Service: Planning, Permitting & ConsultingService: Alternatives AnalysesService: Constructability ReviewsIndustry: Power GenerationIndustry: Electric UtilitiesType: Civil Engineering+72 more

Buzz High Voltage, LLC

Expert Consulting for All Things High Voltage

Website6 projects1 leaders1 credentialsUpdated Jun 2026

Project: Cable Accessory Manufacturer Test Area Design

Service: High Voltage Testing & InspectionService: Dielectric TestingService: Equipment InspectionIndustry: Electric UtilitiesIndustry: GovernmentType: Electrical Engineering+33 more

C2 Group

San Diego, CA

A Modern Program Management Company

WebsitePhone2 offices2 projects1 credentialsUpdated Jun 2026

Project: San Diego Roadway As-Built Mapping

Service: Engineering and PM/CM ServicesService: Project ManagementService: Construction ManagementIndustry: InfrastructureIndustry: Electric UtilitiesType: Civil Engineering+24 more

C6 Engineering, LLC

Electrical, Instrumentation & Controls Services

WebsiteUpdated Jun 2026

Service detail: Project Management and Consulting

Service: Project Management and ConsultingService: Project PlanningService: Feasibility StudiesIndustry: IndustrialIndustry: Renewable EnergyType: Electrical Engineering+30 more

CDG Engineers, Inc.

St. Louis, MO

Engineering a better way.

WebsitePhone4 offices2 projects1 leadersFounded 1992Size Estimate: 100+ employees

Project: Cedar Rapids Reach 1 Flood Protection

Service: Architectural EngineeringService: Civil EngineeringService: Flood ProtectionIndustry: UtilitiesIndustry: Electric UtilitiesType: Civil Engineering+22 more

CEC Corporation

Oklahoma City, OK

Get Stuff Built Right

WebsitePhone8 offices18 leaders4 credentialsFounded 1921Updated Jun 2026

Service detail: Transportation Engineering

Service: Transportation EngineeringService: Transportation Design and PlanningService: Bridge Design and InspectionsIndustry: TransportationIndustry: Highways & RoadsType: Civil Engineering+28 more

CLC Engineering, LLC

Alexandria, LA

CLC Engineering is a consulting practice based in Alexandria, Louisiana, known for its focused, client-driven approach and responsive service. It specializes in civil and structural engineering for foundations, substations, switchyards, and transmission and distribution lines. Additional services include electrical design for high-voltage systems, environmental services, and forensic engineering inspections for industrial, commercial, and residential structures. Licensed in all 50 states and one U.S. territory, CLC manages projects across the continental United States and internationally.

WebsitePhone1 office3 leaders3 credentialsSize Estimate: 11-50 employeesUpdated Jun 2026

Service detail: Civil Design

Service: Civil DesignService: Storm DrainageService: Site GradingIndustry: Power Transmission & DistributionIndustry: Electric UtilitiesType: Civil Engineering+38 more

CLP Engineering

Denver, CO

Planning and design with O&M in mind

WebsitePhone1 office8 projects11 leaders1 credentialsUpdated Jun 2026

Project: APG Electrical Distribution System Infrastructure Upgrade

Service: MicrogridsService: Microgrid Systems IntegrationService: Planning and Energy AnalysisIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Power & Utility Engineering+38 more

CMA Architects & Engineers LLC

Guaynabo, PR

Designing Today the Puerto Rico of Tomorrow

WebsitePhone1 office23 leadersUpdated Jun 2026

Service detail: Architecture

Service: ArchitectureService: Space ProgrammingService: Facilities Master PlanningIndustry: Affordable HousingIndustry: CommercialType: Architecture & Engineering+113 more

Campos EPC, LLC

Denver, CO

The Leader In Energy Infrastructure

WebsitePhone20 offices1 projects11 leaders3 publicationsFounded 2005

Project: 350MW Data Center Power Generation & Substation Facility

Service: EngineeringService: Pipeline EngineeringService: Transmission And Midstream Pipeline DesignIndustry: Oil & GasIndustry: UtilitiesType: EPC+51 more

Columbia Engineering Group

Washougal, WA

Engineering Excellence with Comprehensive Full Service Solutions

WebsitePhone1 office6 projects5 leadersUpdated Jun 2026

Project: Forensic Services Unit Chiller Replacement

Service: Mechanical EngineeringService: HVAC System DesignService: Building AutomationIndustry: CommercialIndustry: RetailType: MEP+70 more

Commonwealth Associates, Inc.

Jackson, MI

Experience the power of partnership.

WebsitePhone1 office11 projects6 credentialsSize Estimate: 50-199 employeesUpdated Jun 2026

Project: 500MW Solar Farm Engineering & System Studies

Service: Renewable Energy EngineeringService: Solar PV DesignService: Battery Energy Storage SystemsIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+44 more

Copper Roots

Fort Worth, TX

Engineering Excellence, Rooted in People

Website1 office10 leadersSize Estimate: 10-49 employeesUpdated Jun 2026

Service detail: Power System Design

Service: Power System DesignService: Greenfield, Rebuild, and Interconnection DesignService: Foundation DesignIndustry: UtilitiesIndustry: Power Transmission & DistributionType: Power & Utility Engineering+12 more

Crist Engineers, Inc.

Little Rock, AR

Quality Engineering In Water & Wastewater Management

WebsitePhone2 offices9 projects14 leadersFounded 1938Updated Jun 2026

Project: Paragould Wastewater Treatment Plant Headworks Improvements

Service: Civil EngineeringService: Water EngineeringService: Planning & Computer ModelingIndustry: GovernmentIndustry: UtilitiesType: Automation & Controls+24 more