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.

Filters1

Apex Engineering Group

Fargo, ND

Apex Engineering Group brings clarity and confidence to complex engineering projects.

WebsitePhone7 offices11 projects5 leaders18 credentialsFounded 2010

Project: City of Detroit Lakes, MN Municipal Engineering Services

Service: Water EngineeringService: Water wells and intake structuresService: On-site pilot plantsIndustry: GovernmentIndustry: Water ResourcesType: Civil Engineering+83 more

Barton & Loguidice

Syracuse, NY

The Experience to Listen. The Power to Solve.

WebsitePhone1 office5 projects1 leaders5 credentials5 publications

Project: Rome Water Pollution Control Facility Anaerobic Digestion and Combined Heat and Power Improvements

Service: Water ResourcesService: Water Supply EngineeringService: Wastewater & Water Resource RecoveryIndustry: GovernmentIndustry: FederalType: Architecture & Engineering+61 more

Bassett Engineering, Inc.

Montoursville, PA

Innovative Solutions, Proven Technology, Quality Engineering.

WebsitePhone1 office3 projects1 leaders4 credentialsFounded 1996

Project: Bordell Road Bridge

Service: Bridges and CulvertsService: Full replacementService: RepairIndustry: GovernmentIndustry: Water SupplyType: Civil Engineering+25 more

Blossom Consulting & Engineering Inc.

Williamsburg, VA

Engineering Land & Water Resources for the Future

WebsitePhone2 offices10 projects5 leaders11 credentialsSize Estimate: 1-25 employees

Project: Beaver Creek Watershed Assessment

Service: Water Resources EngineeringService: Watershed Analysis and Hydrologic ModelingService: Hydrologic and Hydraulic AnalysesIndustry: GovernmentIndustry: DefenseType: Civil Engineering+54 more

C.C. Johnson & Malhotra, P.C.

Baltimore, MD

Provide the Highest Level of Service to Our Clients While Delivering Value

WebsitePhone6 offices16 projects8 leadersFounded 1979Size Estimate: 50-100 employees

Project: 540 West Madison

Service: Buildings and FacilitiesService: HVAC Systems DesignService: Electrical Power and LightingIndustry: CommercialIndustry: RetailType: Civil Engineering+58 more

Celadon Technologies, LLC

Rockville, MD

Solutions for Water, Wastewater, and Energy Efficiency

WebsitePhone1 officeUpdated Jun 2026

Service detail: Water Infrastructure Engineering

Service: Water Infrastructure EngineeringService: Small & Large Diameter Distribution MainsService: Transmission Main DesignIndustry: Water SupplyIndustry: WastewaterType: Water / Wastewater Engineering+31 more

Commonwealth Engineers, Inc.

Indianapolis, IN

Award-Winning, Cost-Effective Engineering Solutions

WebsitePhone1 office4 projects4 credentialsFounded 1974Updated Jun 2026

Project: Wastewater Treatment Plant Rehabilitation - Owensboro, Kentucky

Service: WastewaterService: Wastewater treatment plant design and rehabilitationService: Collection system improvementsIndustry: WastewaterIndustry: Water SupplyType: Civil Engineering+28 more

Farnham & Associates, Inc.

Clarks Summit, PA

Water and Wastewater Specialists, North East Pennsylvania

WebsitePhone1 office1 leadersUpdated Jun 2026

Service detail: Drinking Water Analysis

Service: Drinking Water AnalysisService: Predrill baseline analysisService: Water quality analysis, modeling, and predictive studiesIndustry: Water SupplyIndustry: WastewaterType: Water / Wastewater Engineering+92 more

Gwin, Dobson & Foreman, Inc.

Altoona, PA

Gwin, Dobson & Foreman, Inc. is an award-winning environmental and civil engineering firm headquartered in Altoona, Pennsylvania, with more than 70 years of practice. Known by the abbreviation GD&F, Gwin, Dobson & Foreman specializes in advanced water and wastewater treatment processes including biological nutrient removal and membrane filtration, and also provides dam engineering, civil works, land planning, and transportation infrastructure services.

WebsitePhone1 officeUpdated Jun 2026

Service detail: Water Systems

Service: Water SystemsService: Wastewater SystemsService: Environmental EngineeringIndustry: Water SupplyIndustry: WastewaterType: Water / Wastewater Engineering+8 more

Hazen and Sawyer

New York, NY

all things water

WebsitePhone2 officesSize Estimate: 2,400 employeesUpdated Jun 2026

Service detail: Drinking Water

Service: Drinking WaterService: Treatment Plant Design And OptimizationService: Regulatory ComplianceIndustry: Water SupplyIndustry: WastewaterType: Water / Wastewater Engineering+20 more

L2 Engineering D.P.C.

Derby, NY

L2 Engineering D.P.C. provides water and wastewater engineering solutions, with recommendations tailored to balance technical requirements, regulatory compliance, budget limitations, and operational concerns. The practice serves municipal and industrial clients, as well as prime consulting engineering firms, by delivering practical evaluations, designs, and reports.

WebsitePhone1 office5 projects1 leaders5 credentialsUpdated Jun 2026

Project: Sewer System Evaluation Survey Engineering Report

Service: Water and Wastewater EngineeringService: Water Resources EngineeringService: Treatment Feasibility Studies and DesignIndustry: WastewaterIndustry: Water SupplyType: Water / Wastewater Engineering+12 more

Laura Marcolini & Associates, Inc.

Cumberland, RI

Civil & Environmental Engineers

WebsitePhone1 office1 leadersSize Estimate: 1-10 employeesUpdated Jun 2026

Service detail: Water & Wastewater Treatment Engineering

Service: Water & Wastewater Treatment EngineeringService: Enhanced Nutrient RemovalService: By-product and Solids HandlingIndustry: Water SupplyIndustry: WastewaterType: Civil Engineering+16 more

McGill Associates, PA

Asheville, NC

Shaping Communities Together

WebsitePhone8 offices9 projects1 leaders3 credentialsFounded 1984

Project: Mission Tower North

Service: Water & WastewaterService: Water Source and TreatmentService: Water DistributionIndustry: GovernmentIndustry: Water SupplyType: Civil Engineering+74 more

N2W Engineering Inc

Creating Partnerships For A Sustainable Planet.

Website3 projects6 leadersUpdated Jun 2026

Project: City of Banning Wastewater Treatment Plant and Recycled Water Upgrades

Service: Water EngineeringService: Pumping & Conveyance FacilitiesService: Storage & Distribution SystemsIndustry: GovernmentIndustry: IndustrialType: Water / Wastewater Engineering+25 more

Pierson Enterprises, LLC

Engineering Solutions for Water & Wastewater Treatment, Stormwater Management

Website4 projects1 leaders3 credentialsSize Estimate: 1-9 employeesUpdated Jun 2026

Project: NClear / Creston Water Solutions Support

Service: Wastewater and Stormwater InfrastructureService: On-Site Treatment DesignService: Runoff Management RetrofitsIndustry: WastewaterIndustry: Water SupplyType: Environmental Engineering+18 more

Princeton Hydro, LLC

Trenton, NJ

Inspired by Nature. Engineered with Science.

WebsitePhone1 office9 projects8 leaders20 credentials6 publications

Project: Colonial Lake Bank Stabilization and Landscape Architecture

Service: Water Resources EngineeringService: Stormwater Management and Green Infrastructure DesignService: Flood Modeling and Floodplain AnalysisIndustry: GovernmentIndustry: Environmental & RemediationType: Environmental Engineering+40 more

Provenance Engineering

Weatherford, TX

Rooted to be uniquely different in approach and execution.

WebsitePhone1 office8 projects2 leadersSize Estimate: 1-25 employeesUpdated Jun 2026

Project: Water Supply and Treatment Program

Service: Water and Wastewater TreatmentService: Water Treatment Plant EngineeringService: Wastewater Treatment Plant DesignIndustry: GovernmentIndustry: Water SupplyType: Water / Wastewater Engineering+23 more

Resource Environmental Solutions, LLC

Bellaire, TX

Restoring communities to resilience.

Website1 office2 projects2 credentialsSize Estimate: 500-1,000 employeesUpdated Jun 2026

Project: Klamath River Renewal

Service: Environmental MitigationService: Mitigation Banking CreditsService: Permittee-Responsible Mitigation (PRM)Industry: TransportationIndustry: Land DevelopmentType: Environmental Engineering+17 more

SRT Consultants

San Francisco, CA

Client-focused engineering and management solutions for complex water and wastewater utility challenges

WebsitePhone3 offices19 leaders5 credentialsFounded 2004Updated Jun 2026

Service detail: Water Resources & Planning

Service: Water Resources & PlanningService: Feasibility StudiesService: Integrated Water Resource PlanningIndustry: Water SupplyIndustry: WastewaterType: Civil Engineering+46 more

Sigma Design Company, LLC

Middlesex, NJ

Sigma Design Company, LLC is a product design, engineering, and contract manufacturing firm founded in 1999 and headquartered in Middlesex, New Jersey. It operates from a 20,000-square-foot Technology Commercialization and New Product Manufacturing Center and serves global manufacturing clients across industries including health and life sciences, food processing, clean energy, industrial water, marine, and defense. Core capabilities include mechanical and electrical product design, new product development, design/build manufacturing, custom machine manufacturing, build-to-print fabrication, and advanced engineering analysis and simulation. It employs licensed professional engineers in New York and New Jersey and has delivered over 1,000 design and design/build projects. A subsidiary group, Sigma Industrial Water Group, develops patented filtration and water conditioning systems for industrial water and non-hazardous wastewater applications.

WebsitePhone1 office2 leaders8 credentialsFounded 1999Updated Jun 2026

Service detail: Product Design & Development

Service: Product Design & DevelopmentService: New Product DevelopmentService: Design for Manufacturing (DFM)Industry: Life SciencesIndustry: Food & BeverageType: Mechanical Engineering+21 more

Sustainable Streams, LLC

Louisville, KY

Science, Service, and Solutions for Rivers and Watersheds

WebsitePhone1 office5 projects7 leaders15 credentials2 publications

Project: Lick Run Stream Daylighting & Urban Renewal

Service: Stream RestorationService: Stream DaylightingService: Low Head Dam MitigationIndustry: Stormwater & Flood ControlIndustry: Water ResourcesType: Environmental Engineering+15 more

The Stover Group

Stillwater, OK

Environmental Solutions Since 1984

WebsitePhone1 office1 leaders11 credentialsFounded 1984Updated Jun 2026

Service detail: Operations

Service: OperationsService: Plant start-up assistanceService: Pilot scale operationsIndustry: WastewaterIndustry: Water SupplyType: Environmental Engineering+17 more

WHB Engineers

Engineering the Systems That Shape the World

Website7 projectsUpdated Jun 2026

Project: City of Redlands 16 Tank Seismic Assessment

Service: Water Treatment and PurificationService: Wastewater Treatment and ReclamationService: Water Infrastructure and DistributionIndustry: Water SupplyIndustry: WastewaterType: Civil Engineering+18 more

West Yost

Woodland, CA

Advancing Water Resources for Future Generations

WebsitePhone2 offices4 projects1 leaders8 credentialsFounded 1990

Project: Davis-Woodland Water Supply Project

Service: Water ServicesService: Water Master PlanningService: Hydraulic ModelingIndustry: Water SupplyIndustry: GovernmentType: Automation & Controls+48 more