Public engineering firm directory

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Annex Engineering Group

Columbus, OH

Founded in 2017, Annex Engineering Group is a service-oriented MEP and fire protection engineering firm based in Columbus, Ohio. Annex offers mechanical, electrical, plumbing, and fire protection coordination engineering for projects ranging from office remodels, multi-family residential, and restaurants to manufacturing/industrial facilities and historical renovations. Licensed in 49 states and Washington D.C., Annex serves as the prototype engineer for several national clients, establishing design standards that reduce construction costs and timelines while increasing consistency and quality.

WebsitePhone1 officeFounded 2017Updated Jun 2026

Service detail: Mechanical Engineering

Service: Mechanical EngineeringService: HVAC System DesignService: Central Plant SystemsIndustry: CommercialIndustry: RetailType: MEP+31 more

Battel Engineering, Inc.

Scottsdale, AZ

Battel Engineering, Inc. is an aerospace electronics engineering practice specializing in high-voltage power systems and instrument electronics for spacecraft. Operating from Scottsdale, Arizona, it provides electrical design, transformer development, qualification testing, and electromagnetic compatibility evaluation for critical space missions.

WebsitePhone1 office13 projects1 leadersUpdated Jun 2026

Project: SAM Instrument Electronics for Mars Science Laboratory

Service: High-Voltage Power Systems EngineeringService: Custom Transformer Design and ManufacturingService: Voltage Multiplier DevelopmentIndustry: AerospaceIndustry: SpaceType: Aerospace Engineering+10 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

Equagen Engineers PLLC

Raleigh, NC

Engineering by Ingenuity

Website1 office2 credentialsSize Estimate: 51-200 employeesUpdated Jun 2026

Service detail: Substation Engineering

Service: Substation EngineeringService: Feasibility StudiesService: Site Selection and EvaluationIndustry: Power Transmission & DistributionIndustry: Renewable EnergyType: Power & Utility Engineering+54 more

Innovative Design and Engineering Solutions

Georgetown, KY

Smart solutions in system design

Website1 office5 leadersFounded 2015Size Estimate: 1-10 employeesUpdated Jun 2026

Service detail: Control Systems and Automation

Service: Control Systems and AutomationService: PLC ProgrammingService: Machine Vision IntegrationIndustry: ManufacturingIndustry: IndustrialType: Automation & Controls+29 more

Interrail Engineering Inc

Jacksonville, FL

Keeping the Trains Moving and Our Citizens Safe

WebsitePhone1 office9 projects6 leaders1 credentialsFounded 1997

Project: Norfolk Southern Railroad PTC Installation

Service: Engineering and DesignService: Application ProgrammingService: Computer Aided DraftingIndustry: RailIndustry: TransitType: Automation & Controls+31 more

LB Electric Co., LLC

Cedar Grove, NJ

The Best Electrical Contractor In New York & New Jersey

WebsitePhone3 offices10 projects1 leaders21 credentialsFounded 1999

Project: Culver Line Project - Contract S-4009

Service: Electrical InstallationService: Power System InstallationService: Traction Power SystemsIndustry: TransitIndustry: TransportationType: Electrical Engineering+31 more

Power Resources International, Inc.

West Babylon, NY

The New York metro's leader in automation solutions.

WebsitePhone1 office9 projects4 credentialsFounded 1992Size Estimate: 25-50 employees

Project: Canarsie Line (L Train) PA/CIS Upgrades

Service: Project ManagementService: Infrastructure Project Lifecycle ManagementService: Contract and Closeout DocumentationIndustry: RailIndustry: TransitType: Automation & Controls+55 more

RML Acoustics, LLC

Charlotte, NC

Acoustical consulting and noise control services across the Southeast

WebsitePhone1 office1 leadersUpdated Jun 2026

Service detail: Noise Control and Vibration Isolation

Service: Noise Control and Vibration IsolationService: MEP System Noise Control and Vibration IsolationService: Architectural Noise ControlIndustry: CommercialIndustry: ResidentialType: Acoustic Consulting+22 more

TEAMWORKnet Inc

Lakeland, FL

Electrical Power Engineering You Can Depend on

WebsitePhone1 office1 leaders5 credentialsFounded 1977Updated Jun 2026

Service detail: Power Engineering & Electrical Design

Service: Power Engineering & Electrical DesignService: Power Distribution System DesignService: Substation Design & EngineeringIndustry: Electric UtilitiesIndustry: Power Transmission & DistributionType: Electrical Engineering+32 more

Van Haren Electric

Byron Center, MI

Van Haren Electric is a West Michigan electrical contracting firm founded in 1947 by Adrian Van Haren and now led by second-generation owner Brian Van Haren. Serving industrial, commercial, and institutional customers throughout West Michigan for over 75 years, the company provides electrical contracting, construction, and service from its Byron Center, Michigan facility, which includes a 10,000-square-foot warehouse for material staging and prefabrication and 8,000 square feet of engineering, CAD, and administrative space. Service vans operate on 24-hour emergency call.

WebsitePhone1 office1 leadersFounded 1947Updated Jun 2026

Service detail: Electrical Testing

Service: Electrical TestingService: Load Harmonics and AnalysisService: Hi-PottingIndustry: IndustrialIndustry: CommercialType: Electrical Engineering+24 more