Public engineering firm directory

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ClearStream Environmental

Sandy, UT

Engineered Solutions for Water and Wastewater Treatment

WebsitePhone1 officeFounded 2002Updated Jun 2026

Service detail: Process Design and Engineering

Service: Process Design and EngineeringService: Municipal Water TreatmentService: Municipal Wastewater TreatmentIndustry: Water SupplyIndustry: WastewaterType: Water / Wastewater Engineering+27 more

Federal EC LLC

Woodstock, GA

Industry leader specializing in sewer repair and pipe lining

WebsitePhone1 office2 leadersFounded 1998Updated Jun 2026

Service detail: Pipe Rehabilitation

Service: Pipe RehabilitationService: Chemical GroutingService: Cured-in-Place Pipe LiningIndustry: WastewaterIndustry: Stormwater & Flood ControlType: Civil Engineering+39 more

Franc Engineering

Morrison, CO

Senior engineering judgment for regulated industrial projects

WebsitePhone1 office2 credentialsUpdated Jun 2026

Service detail: Process & Facility Engineering

Service: Process & Facility EngineeringService: Heat and Material BalancesService: Process Flow Diagrams (PFDs) and P&IDsIndustry: IndustrialIndustry: Oil & GasType: Process Engineering+39 more

HHNT Environmental Consulting

Macon, GA

Do What it Takes for Success

Website6 offices6 projects13 leadersFounded 1990Size Estimate: 50-99 employeesUpdated Jun 2026

Project: Surface Mine Permitting

Service: Engineering DesignService: Site and Facility DesignService: Stormwater and Erosion Control DesignIndustry: Waste ManagementIndustry: MiningType: Environmental Engineering+30 more

SRK Consulting

Denver, CO

Mining & Exploration Consultants

Website1 office6 projects6 leaders9 publicationsFounded 1974Size Estimate: 200-1,000 employees

Project: Deer Creek Coal Mine Ventilation Planning

Service: Mineral ExplorationService: Geological InterpretationService: Resource EstimationIndustry: MiningIndustry: MetalsType: Civil Engineering+59 more

STL Engineering

St. Louis, MO

Fast Response Times And Reliable Service Set Us Apart.

WebsitePhone3 offices2 projects2 leaders1 credentialsUpdated Jun 2026

Project: New Greenfield Trap Rock Quarry Operation

Service: Structural EngineeringService: Structural Steel DesignService: Concrete DesignIndustry: MiningIndustry: Aggregates & QuarryingType: Structural Engineering+52 more

The Mouat Company, Inc.

Birmingham, AL

The Mouat Company, Inc. has delivered turnkey industrial facilities since 1924, originally as an equipment representative for the foundry industry before evolving into a design-build construction firm by the early 1970s. For more than 50 years, Mouat has designed and built foundry facilities, frac sand plants, and mineral processing plants across the U.S., Mexico, Europe, and Central Asia. Its fixed-price design-build model gives clients a defined project cost before contract award, eliminating the open-ended exposure common to cost-plus EPCM arrangements. Process design, 3D facility modeling, multi-discipline engineering coordination, and fabrication integration are all delivered under a single contract from concept through commissioning.

WebsitePhone1 officeFounded 1924Updated Jun 2026

Service detail: Concept Development

Service: Concept DevelopmentService: Process Throughput AnalysisService: Capital Cost EstimationIndustry: IndustrialIndustry: MiningType: Process Engineering+15 more

Upper Consulting, Inc.

Quincy, IL

Process Mechanical Engineering Consulting

WebsitePhone1 office8 projectsUpdated Jun 2026

Project: Alexandria Company for Seed Processing - Multiseed Crush Plants

Service: Plant & Process EngineeringService: Process Development (Continuous & Batch)Service: PFD & P&ID Creation & UpdatingIndustry: AgricultureIndustry: Food & BeverageType: Process Engineering+38 more

Weldment Design, LLC

North Charleston, SC

On-Demand Weldment Design & Engineering Support

WebsitePhone1 office1 credentialsSize Estimate: 1-25 employeesUpdated Jun 2026

Service detail: Flex Draft CAD Services

Service: Flex Draft CAD ServicesService: 3D ModelingService: 2D Detailing for Shop FabricationIndustry: IndustrialIndustry: MarineType: Structural Engineering+39 more

ZAP Engineering & Construction Services, Inc.

Lakewood, CO

Excellence in Execution

WebsitePhone2 offices7 projectsUpdated Jun 2026

Project: 60 MMSCFD Libby Gas Plant

Service: Civil and Structural EngineeringService: Civil EngineeringService: Structural Engineering DesignIndustry: Oil & GasIndustry: MiningType: Automation & Controls+34 more