Public engineering firm directory

Find engineering consulting firms by capability and location.

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Chamlin & Associates

Peru, IL

Shaping communities with integrity, expertise, and purpose.

WebsitePhone3 offices2 projects4 leaders1 credentialsFounded 1952

Project: Spring Valley Wastewater Treatment Plant

Service: Land SurveysService: Boundary SurveysService: Construction LayoutIndustry: GovernmentIndustry: Water SupplyType: Civil Engineering+35 more

Engineering Systems Inc.

Scottsdale, AZ

Multidisciplinary Expertise. Industry Insight.

Website22 offices4 projects4 leadersSize Estimate: 200-1,000 employeesUpdated Jun 2026

Project: Uncovering the Truth Behind a Toy Archery Injury

Service: Accident ReconstructionService: Motor Vehicle Accident ReconstructionService: Industrial and Workplace Incident AnalysisIndustry: AgricultureIndustry: MiningType: Chemical Engineering+57 more

Field Theory Consulting Inc.

Vernon Hills, IL

Celebrating 40+ Years of Executing Wireless Concepts

WebsitePhone1 office6 projects1 credentialsFounded 1984Size Estimate: 1-25 employees

Project: EMP Hardening

Service: Antenna DesignService: Custom Antenna DesignService: Connectivity SpecializationIndustry: DefenseIndustry: GovernmentType: Telecom / RF Engineering+43 more

Marino Engineering Associates, Inc.

St. Louis, MO

Advanced Geotechnical, Subsidence, and Forensic Engineering

WebsitePhone3 offices1 leadersUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Shallow & Deep FoundationsService: Earth Retaining SystemsIndustry: MiningIndustry: Oil & GasType: Geotechnical Engineering+35 more

SKS Engineers, LLC

Decatur, IL

SKS Engineers, LLC is a multidisciplinary engineering firm based in Decatur, Illinois, serving Central Illinois and surrounding areas for over 50 years. SKS provides civil engineering, geotechnical engineering, structural engineering, mechanical/electrical/plumbing engineering, land surveying, soils and materials testing, subsurface investigations, and construction quality control through a partnership of licensed professional engineers and qualified technicians. A sister entity, Land Engineers, LLC, operates from Bloomington, Illinois.

WebsitePhone2 offices9 projectsUpdated Jun 2026

Project: Millikin University Theater & Dance Building

Service: Civil Engineering and Land DevelopmentService: Grading plans and drainage studies, hydrologic and hydraulic analysisService: Pavement design and streets and highwaysIndustry: EducationIndustry: IndustrialType: Civil Engineering+37 more