CTL Engineering, formerly known as Columbus Testing Laboratory, is a full-service consulting company. Established in 1927, it provides construction administration, product testing, roofing and mining services. The company offers land surveying, design, environmental engineering, and software development and digitizing services. CTL Engineering maintains a staff of more than 200 employees, including engineers, architects, chemists, environment scientists, geologists and technicians. It provides site mapping, stormwater management and pavement design services for clients in the commercial and residential sectors. The company offers risk assessment and program and project management services. CTL Engineering undertakes projects for schools, banks, restaurants, transportation agencies, and oil and gas industries. It provides environmental monitoring, slope stability evaluation and natural stream channel design services. In addition, the company offers equipment calibration, on-site inspection and specification testing services. CTL Engineering is accredited by the Association of State Highway & Transportation Officials and the Leadership in Energy and Environmental Design. Headquartered in Columbus, Ohio, it maintains a location in Morgantown, W.Va.