EMPLOYEE ACCESS Services Accreditations About Clients Careers Contact The CTL difference People place immense confidence in CTL We are dedicated to meeting our client's needs with the best people and time-tested processes that are continually refined as new technology comes online. Always safety first At CTL, the most important part of our job is to get our employees home safely—every night. We understand that we work in environments with potential dangers and constantly changing variables, whether it’s night-time paving, distracted or impaired drivers. Safety is paramount in everything we do out in the field and in the lab. We make safety our top priority because it’s the right way to run a business. Always customer focused The CTL brand continues to build on a heritage of best-in-class attention to our clients’ needs. Our business has thrived for over a century by keeping a razor-sharp focus on what is best for our clients. High tech We are committed to exceeding our clients’ expectations by staying at the forefront of technology to provide timely, accurate field reports and invoices. High energy Materials testing, inspection, training, consulting and research doesn’t mean you have to deal with dull and boring experts. Our experts are the cream of the crop—exuding personality, experience and integrity. © 2021 Chicago Testing Laboratory, Inc.

EMPLOYEE ACCESS Services Accreditations About Clients Careers Contact Our mission: Ensuring integrity in infrastructure Clients Through our many years of service, we have developed a sizable list of clients that have come to rely on us as their preferred full-service partner. Please review some of our recent case histories, and do not hesitate to call us for more information. We look forward to working with you. Illinois Department of Transportation Illinois Tollway Chicago Department of Transportation Cook County Department of Transportation Will County Department of Transportation Kankakee County Highway Department DuPage County Department of Transportation McHenry County Department of Transportation Indiana Department of Transportation Walsh Construction F.H. Paschen Contractors Kane County DOT Payne & Dolan M.A.T. Asphalt Burns & McDonnell Crawford, Murphy & Tilly HR Green IHC Lake Land College © 2021 Chicago Testing Laboratory, Inc.