CTL Engineering, Inc. is a full service consulting engineering, testing and inspection company. CTL Engineering, formerly known as Columbus Testing Laboratory, was established in 1927 as an independent engineering and testing laboratory serving the local community. During the early years, the company focused on soils, foundation engineering, and construction testing and inspection services. Additional Servcies have been added over the last 30 years including Chemical Analysis, Metallurgy, Product Testing, Roofing, Environmental Engineering, Software development and Digitising .