David Drengenberg, P.E., S.E.

David Drengenberg, P.E., S.E.

Senior Engineer & Group Director

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Mr. Drengenberg provides structural investigation, assessment, and analysis of existing buildings and civil facilities for CTLGroup’s Structural Engineering & Mechanics division. He has managed field investigations of damaged structures, performed safety and quality assessments of construction operations, and provided expert opinions. Additionally, he has investigated structural and construction deficiencies, which involved defect documentation, repair development, observation of remedial structural demolition, and served as an expert witness providing litigation support related to construction defects and construction accidents. Mr. Drengenberg has also assisted in development and implementation of safety recommendations and code revisions related to high-rise construction and implemented structural quality training programs for New York City building inspectors.


M.S. in Structural Engineering

University of Illinois at Urbana-Champaign, 2003


B.S. in Civil Engineering

University of Illinois at Urbana-Champaign, 2001


Drengenberg, D. and S. Stacey. 2018. “Investigation and Repair of a Megatall Building Transfer Mat.” Technical Council on Forensic Engineering, ASCE 8th Forensic Engineering Congress.

Drengenberg, D. 2012. “NYC High Rise Construction Study: Structural Integrity and Safety During the Construction Phase.” University of Illinois Structural Engineering Conference, Champaign, Illinois. April 17.

Corley, W. G., S. Smith, and D. Drengenberg. 2011. “WTC, Insurance Disputes and Code Changes Ten Years Later.” Construction SuperConference, San Francisco, California. December 16.

Corley, W. G., J. E. Brewe, and D. Drengenberg. 2011. “Building Code Improvements Resulting from World Trade Center and Oklahoma City Attacks.” 9th International Conference on Shock & Impact Loads on Structures. Fukuoka, Japan. November 16-18.

Drengenberg, D. 2011. “High-Rise Safety & Defects in the Big Apple.” Society of Illinois Construction Attorneys, Chicago Bar Association, Chicago, Illinois. May 17.

Corley, W. G. and D. Drengenberg. 2011. “Evolution of Building Code Requirements in a Post 9/11 World.” CTBUH Journal, Issue III.

  • American Society of Civil Engineers

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