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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ADV-SOC, Inc.

San Diego, CA

Mission-Driven.

WebsitePhone1 office9 projects2 leadersFounded 2012Updated Jun 2026

Project: Naval Air Station North Island Soil Investigation

Service: Environmental ServicesService: Phase I and Phase II Environmental Site AssessmentsService: Underground Storage Tank Assessment and ClosureIndustry: FederalIndustry: DefenseType: Architecture & Engineering+39 more

AEPC Group, LLC

Santa Clarita, CA

We build confidence

WebsitePhone1 office1 projects4 leadersUpdated Jun 2026

Project: Offset Success for Aviation Client

Service: ArchitectureService: Schematic and Conceptual Design DevelopmentService: Construction Documents and SpecificationsIndustry: AerospaceIndustry: AviationType: Architecture & Engineering+40 more

AESUS Design Group, LLC

Tempe, AZ

Integrated Architecture & Engineering

WebsitePhone3 offices12 projects2 leaders1 credentialsFounded 2014

Project: 5th Floor Med-Surg Inpatient Wing Gut & Remodel

Service: ArchitectureService: Architectural Concept DesignService: Design Development DocumentationIndustry: HealthcareIndustry: FederalType: Architecture & Engineering+48 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

Currier & Company, Inc.

Los Angeles, CA

Reliable engineering and consulting services by experienced professionals.

Website2 offices1 leadersUpdated Jun 2026

Service detail: Engineering

Service: EngineeringService: Fuel Facility Design & ConstructabilityService: Aviation Fueling & Hydrant SystemsIndustry: AviationIndustry: AirportsType: Civil Engineering+37 more

D3 Technologies Inc

San Diego, CA

High-quality engineering services and support

Website1 office2 credentialsFounded 1982Updated Jun 2026

Service detail: Engineering

Service: EngineeringService: Structures Design and Solid ModelingService: Critical Structures EngineeringIndustry: DefenseIndustry: AerospaceType: Aerospace Engineering+65 more

Huitt-Zollars

Los Angeles, CA

Meet a local AE design firm with national reach.

Website5 offices7 leadersUpdated Jun 2026

Service detail: Architecture

Service: ArchitectureService: Architectural DesignService: Interior DesignIndustry: CommercialIndustry: EducationType: Architecture & Engineering+29 more

Oak Leaf Engineering Corp

Suisun City, CA

Oak Leaf Engineering Corp is a Suisun City, California engineering firm providing inspection and testing, quality management, engineering, and program management services to construction and industrial clients. President and CEO Albert Carreon led quality assurance for the San Francisco-Oakland Bay Bridge project and brings that background in structural steel inspection and operations management into a firm that integrates nondestructive testing, IBC special inspections, ISO audits, and construction engineering under one practice.

WebsitePhone1 office1 leadersUpdated Jun 2026

Service detail: Inspection and Testing

Service: Inspection and TestingService: Nondestructive Testing and EvaluationService: IBC Special InspectionsIndustry: InfrastructureIndustry: BridgesType: Materials Testing+7 more

Studio 151 Inc.

San Francisco, CA

From Bold Vision to Built Reality

WebsitePhone7 offices7 projectsUpdated Jun 2026

Project: Courtyard 3 Connector

Service: Construction ManagementService: Program Management and Project ControlsService: Construction Engineering and InspectionIndustry: AviationIndustry: Data CentersType: Civil Engineering+27 more

Toole Design

Silver Spring, MD

Groundbreaking Work That Moves People

Website18 offices4 projects4 leadersFounded 2003Size Estimate: 300-500 employeesUpdated Jun 2026

Project: AASHTO Guide for the Development of Bicycle Facilities

Service: EngineeringService: Conceptual DesignService: Construction AdministrationIndustry: GovernmentIndustry: FederalType: Civil Engineering+40 more

Willdan Group

Anaheim, CA

Willdan transitions communities to clean energy and a sustainable future

WebsitePhone2 offices3 projects1 leadersFounded 1964Size Estimate: 1,000-2,000 employees

Project: NFL Stadium Transportation Management and Operations Plan

Service: Energy and SustainabilityService: Energy efficiency program design and deliveryService: Utility program design and deliveryIndustry: UtilitiesIndustry: GovernmentType: Civil Engineering+55 more