Carlton Olson

Senior Principal & Group Director, Structural Evaluation


  • Structural Engineering + Evaluation


Mr. Olson’s expertise focuses primarily on the evaluation and condition assessment of various reinforced concrete structures, which include conventionally reinforced and pre-stressed concrete structures including foundations, dams, stadiums, parking structures, building facades, bridges, industrial structures, liquid containing structures, cooling towers, and historic structures. His evaluations often utilize specialized nondestructive testing techniques such as impulse radar, impulse response, ultrasonic shear wave tomography, impact-echo, optical fiberscope, and ultrasonic testing. At CTLGroup, Mr. Olson has supervised and performed numerous field and laboratory forensic investigations of materials performance issues. His contract reports include definitive findings regarding causes of damage and deterioration, materials testing, analysis and development of repair procedures, specifications, and drawings. Prior to joining CTLGroup, Mr. Olson served as field, pre-contract, and research engineer for Chicago Bridge & Iron Company, parent company of CBI Industries, Inc.

One might ask the question, “What has kept Mr. Olson working at CTLGroup’s for the past 32 years?” It’s the uniqueness of the work as well as developing relationships with clients while helping solve problems. “No two projects are ever alike. There is always something different about the project setting, problem to be tackled, or the client. I don’t think I could spend every day at work making widgets. CTLGroup provides consulting and testing services, and we want clients to feel comfortable calling on us at any time to discuss their problems. Even if CTLGroup can’t help with the particular problem at hand, we endeavor to direct them to someone who can.”


M.S. in Civil Engineering, University of Illinois at Urbana-Champaign, 1981

B.S. in Civil Engineering, University of Illinois at Urbana-Champaign, 1980


  • American Concrete Institute
  • International Concrete Repair Institute

Featured Publications

Saluda, B. P., E. C. Dodge, P.R. Kolf, and C.A. Olson. 2018. “Reinforced Concrete Antenna Pedestal: Evaluation of concrete consolidation using nondestructive testing and statistical analysis.” Concrete International, April, pg. 40-45.

Davis, A. G., C. A. Olson, and K. A. Michols. 2001. “Evaluation of Historic Reinforced Concrete Bridges.” Civil Engineering, Reston, Virginia.

Volz, J. S., C. A. Olson, R. G. Oesterle, and S. H. Gebler. 1997. “Are They Pour Lines or Cold Joints?” Concrete Construction, Chicago, IL. April.

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