APEX Consulting Engineers specializes in civil infrastructure engineering and land surveying services for governmental, municipal, industrial, and commercial clients largely in the Transportation Industry. Our primary clients include IDOT, ISTHA, CDOT, CTA and the RTA. Our fundamental business strategy is building long-term client relationships with these industry giants among others. APEX is a Minority-Owned Disadvantaged Business Enterprise (M/DBE) certified by the City of Chicago, IDOT and the Illinois Unified Certification Program. APEX is a professional design firm, land surveyor, professional engineering limited liability company licensed by the State of Illinois.