Top 10 Engineering Companies for Construction in Illinois
Discover Illinois’ premier engineering firms powering construction projects statewide.
From infrastructure and transportation to forensic and materials science, these industry leaders bring expertise, innovation, and reliability.
FEATURED ENGINEERING COMPANIES
Stantec
Global design and consulting firm with a strong Illinois presence, delivering multidisciplinary engineering services for infrastructure, transportation, and urban development projects.
Location: Chicago, IL
Website: stantec.com
WSP
International engineering leader providing transportation, infrastructure, and environmental solutions. Known in Illinois for large-scale public projects including highways and transit.
Location: Chicago, IL
Website: wsp.com
Wiss, Janney, Elstner Associates (WJE)
Northbrook-based firm specializing in forensic engineering, structural diagnostics, and materials science. Widely recognized for solving complex construction challenges.
Location: Northbrook, IL
Website: wje.com
CTLGroup
Engineering and materials science firm offering forensic investigation, structural evaluation, and lab testing for construction and infrastructure.
Location: Skokie, IL
Website: ctlgroup.com
Contact: Headquarters office (Skokie)
H.W. Lochner, Inc.
Founded in Chicago, Lochner provides planning, design, and construction engineering for transportation projects—highways, transit, and aviation.
Location: Chicago, IL
Website: hwlochner.com
Contact: Chicago headquarters
Collins Engineers, Inc.
Specializes in marine and waterfront engineering, structural inspection, and civil/site design for municipal, commercial, and industrial clients.
Location: Chicago, IL
Website: collinsengr.com
Hanson Professional Services Inc.
Springfield-based firm offering civil engineering, environmental consulting, energy planning, and project commissioning across Illinois.
Location: Springfield, IL
Website: hanson-inc.com
Manhard Consulting
Full-service civil engineering and surveying firm delivering land development, water resources, construction management, and landscape architecture solutions.
Location: Lincolnshire, IL
Website: manhard.com
Contact: Lincolnshire headquarters
Alfred Benesch & Company
Trusted civil engineering company specializing in railroad, highway, and bridge design along with construction management.
Location: Chicago, IL
Website: benesch.com
Contact: Chicago office
Environmental Design International (EDI)
Chicago-based multidisciplinary firm offering civil engineering, surveying, construction inspection, and environmental consulting services.
Location: Chicago, IL
Website: ediconsulting.com
