Public engineering firm directory

Find engineering consulting firms by capability and location.

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Yei Engineers Inc

Oakland, CA

Design Excellence | Collaboration | Innovation | Sustainability

Website3 officesFounded 1975Updated Jun 2026

Service detail: Electrical Engineering

Service: Electrical EngineeringService: Short Circuit and Coordination StudiesService: Arc Flash StudiesIndustry: Arts & CultureIndustry: AviationType: Fire Protection Engineering+22 more

Young Enterprise Systems Inc

Reston, VA

Responsive provider of high-quality professional technical services delivering strategic value to government organizations.

WebsitePhone1 officeFounded 1999Updated Jun 2026

Service detail: Government Mission Critical IT & Telecom Systems

Service: Government Mission Critical IT & Telecom SystemsService: IT and Telecom Systems IntegrationService: Program ManagementIndustry: AirportsIndustry: AviationType: Software Engineering+14 more

ZAPATA Group, Inc.

Charlotte, NC

The Few, The Best!

WebsitePhone1 officeSize Estimate: 20-100 employeesUpdated Jun 2026

Service detail: Architecture and Engineering Design

Service: Architecture and Engineering DesignService: Architectural design and interior designService: Civil and structural engineeringIndustry: DefenseIndustry: FederalType: Architecture & Engineering+11 more

ZUVIC Infrastructure Solutions

Rocky Hill, CT

Designing Complete Solutions

WebsitePhone2 offices10 leadersFounded 1988Updated Jun 2026

Service detail: Civil Engineering

Service: Civil EngineeringService: Site/Civil and Utility DesignService: Transportation DesignIndustry: EducationIndustry: CommercialType: Civil Engineering+16 more

Zachry Nuclear Engineering Inc

Stonington, CT

Dedicated Nuclear Focus

Website2 offices2 credentialsUpdated Jun 2026

Service detail: Engineering

Service: EngineeringService: Mechanical and Electrical EngineeringService: Civil and Structural EngineeringIndustry: NuclearIndustry: Power GenerationType: Automation & Controls+17 more

Zdeno Solutions, LLC

Next-generation dataflow engineering and cybersecurity solutions for defense and intelligence missions.

Website1 leadersFounded 2018Size Estimate: Up to 9 employeesUpdated Jun 2026

Service detail: Distributed SIGINT Operations Support

Service: Distributed SIGINT Operations SupportService: DSO Strategic Planning and ForecastingService: Data Standards Compliance and DesignIndustry: DefenseIndustry: Intelligence & National SecurityType: Defense Engineering+9 more

Zebno LLC

Electrical Engineering Solutions for Modern Infrastructure

Website1 leadersUpdated Jun 2026

Service detail: Electrical Engineering and Systems

Service: Electrical Engineering and SystemsService: Custom Electrical Distribution System DesignService: System and Equipment UpgradesIndustry: GovernmentIndustry: FederalType: Electrical Engineering+8 more

Zeus Engineering, LLC

Chesapeake, VA

Minimal, modern engineering for complex missions.

Website1 officeUpdated Jun 2026

Service detail: Systems Integration

Service: Systems IntegrationService: Model-Based Systems EngineeringService: Interface Control and Configuration ManagementIndustry: DefenseIndustry: FederalType: Defense Engineering+8 more

Zilitivity Inc.

Software engineering and IT services

Website4 projects1 leaders4 credentialsSize Estimate: 11-50 employeesUpdated Jun 2026

Project: COLUMBIA and VIRGINIA Class Nuclear Submarine Ship Control Systems

Service: Software Engineering ConsultingService: Requirements Analysis and PlanningService: System Architecture and DesignIndustry: DefenseIndustry: FederalType: Software Engineering+19 more

apex rocket science, llc

Strategic Solutions for Your Aerospace & Defense Challenges

Website2 credentials3 publicationsUpdated Jun 2026

Service detail: Enterprise Risk Management

Service: Enterprise Risk ManagementService: Portfolio and Program Risk ManagementService: Operations and Supply Chain Risk ManagementIndustry: DefenseIndustry: FederalType: Aerospace Engineering+33 more

avacal, Inc.

Huntsville, AL

Cybersecurity and Engineering Services

Website1 office1 leadersUpdated Jun 2026

Service detail: Cybersecurity

Service: CybersecurityService: Systems Design and IntegrationService: Network DesignIndustry: DefenseIndustry: GovernmentType: Defense Engineering+3 more

eScience & Technology Solutions, Inc.

Landover, MD

eScience & Technology Solutions, Inc. (eSTS) engineers and delivers technology services to Department of Defense and federal agency clients. Its staff integrates systems engineering, software development, cyber support, and program management across defense domains including C4ISR, short- and long-range radar, air traffic control, naval command platforms, and Navy manpower and personnel systems. eSTS holds a $300M IDIQ award from the Space and Naval Warfare Systems Command Sea Warrior Program Office for software development, modernization, and sustainment.

WebsitePhone2 officesUpdated Jun 2026

Service detail: Systems Engineering

Service: Systems EngineeringService: Requirements Engineering and AnalysisService: Architecture Design and SynthesisIndustry: DefenseIndustry: FederalType: Defense Engineering+10 more

enVErgie Consulting, LLC

Washington, DC

enVErgie consulting, LLC provides professional consulting services for the building architectural and engineering community. It focuses on equipping project teams with tools to deliver sustainable, energy-efficient, functional, and economical designs.

Website1 officeUpdated Jun 2026

Service detail: Sustainable Design

Service: Sustainable DesignService: Value EngineeringService: Value Engineering Workshop FacilitationIndustry: FederalIndustry: GovernmentType: Owner's Engineer+10 more

exp Federal Inc.

Chicago, IL

Architecture + Engineering | Construction | Mission Support

Website5 offices9 projects1 credentialsFounded 2012Size Estimate: 250-500 employeesUpdated Jun 2026

Project: Fish Dispersal Barrier

Service: ArchitectureService: Master PlanningService: Facilities ProgrammingIndustry: DefenseIndustry: FederalType: Architecture & Engineering+45 more

iDesign Engineering Inc.

Beltsville, MD

Knowledge. Dedication. Reliability.

WebsitePhone2 offices24 projects11 leadersFounded 2012Size Estimate: 10-20 employees

Project: I-95 Section 200 Widening

Service: Water Resources EngineeringService: Low-Impact Development and ESDService: Hydrologic and Hydraulic ModelingIndustry: Highways & RoadsIndustry: TransportationType: Civil Engineering+33 more

infraTECH Engineers & Innovators, LLC

Houston, TX

Designing Infrastructure, Redefining Horizons

WebsitePhone2 offices6 projects1 credentialsSize Estimate: 10-49 employeesUpdated Jun 2026

Project: US 75 Roadway Widening and Reconstruction

Service: Roadway & CivilService: Roadway Schematic DevelopmentService: Roadway and Interchange DesignIndustry: Highways & RoadsIndustry: BridgesType: Civil Engineering+34 more

nStone Corporation

Albuquerque, NM

Innovative Engineering Solutions & Project Management

WebsitePhone1 office3 leaders1 credentialsFounded 2010Size Estimate: 50-100 employees

Service detail: Operations & Facility Management

Service: Operations & Facility ManagementService: Strategic decision analysisService: Life cycle asset managementIndustry: GovernmentIndustry: NuclearType: Environmental Engineering+47 more

onBoresight Research LLC

Lihue, HI

onBoresight Research LLC is an engineering services organization headquartered in Lihue, Hawaii, providing systems engineering, cybersecurity, hardware modernization, and software development for government test ranges and forward-deployed defense assets. Its technical staff includes electrical, mechanical, and civil engineers, as well as architects with expertise in radar systems, RMF cybersecurity accreditation, FPGA integration, and model-based systems engineering. The organization supports mission planning, operations and maintenance, system performance evaluation, and radar operator training specific to MIT Lincoln Laboratory ROSA and WB-COSIP radar systems.

WebsitePhone1 officeSize Estimate: 1-5 employeesUpdated Jun 2026

Service detail: RMF Cybersecurity

Service: RMF CybersecurityService: System Architecture RestructuringService: Vulnerability Scanning & HardeningIndustry: GovernmentIndustry: FederalType: Defense Engineering+30 more

proHNS LLC

Juneau, AK

Alaska Civil Engineering

WebsitePhone4 offices3 projects4 credentialsFounded 2015Updated Jun 2026

Project: Kasaan Access Road Fish Passage Improvements

Service: Civil EngineeringService: Civil Engineering Design For RoadsService: SitesIndustry: GovernmentIndustry: AviationType: Civil Engineering+6 more

saam architecture, LLC

Boston, MA

A progressive approach to the practice of architecture.

WebsitePhone4 offices8 projects9 leadersUpdated Jun 2026

Project: Hanscom Airfield Rescue and Fire Fighting Facility

Service: Aviation Facility ArchitectureService: Terminal Design and RenovationService: Airfield Support FacilitiesIndustry: AviationIndustry: DefenseType: Architecture & Engineering+23 more