CTL Engineering is a full-service consulting engineering, testing and inspection company. It was established in 1927 as an independent engineering and testing laboratory serving the local community. The company focuses on soils, foundation engineering, and construction testing and inspection services. Additional services include chemical analysis, metallurgy, product testing, roofing, mining engineering, surveying, civil site design, environmental engineering, and software development and digitizing. CTL Engineering has a team of professional civil, chemical, material and geotechnical engineers, environmental scientists, professional geologists, hydrogeologists, wetland specialists, concrete and materials testing laboratories, computer-aided design and drafting operators and technicians to address the consulting and testing needs of various industries. The company also provides engineering and testing services required by the heavy and highway construction industries. Its clients include the Ohio Department of Transportation, Ohio Turnpike Authority, West Virginia Department of Highways, and various municipal and county engineers. CTL Engineering is headquartered in Columbus.