Jonathan Sladek


Jonathan Sladek leads PE’s office in Chicago, where he has built his 21-year career structuring significant and wide-ranging projects around Chicago and beyond.  Prior to joining PE, Jonathan was a Vice President at WSP (formerly Halvorson and Partners) and lead design teams for a variety of project types – including high-rise, mixed-use, residential, commercial, higher education, civic, renovations and more.   Some key projects while there were Mansueto Library at the University of Chicago, Wolf Point West Tower along the Chicago River and the Old Chicago Post Office renovation.

Jonathan is well-versed in engineering across many structural materials and systems – including reinforced concrete and post-tensioned structures, steel structures, and specialty structures including wood, precast, light-gauge and masonry.  With this expertise, his knack for problem solving and his inherently thoughtful and collaborative approach, Jonathan helps teams bring even the most complex projects to life with structures that are well-integrated, buildable and economical.

Professional Experience:  since June 2000
Pierce Engineers, Inc. since May 2021
Licensed Structural Engineer in IL
Licensed Professional Engineer in VA

Master of Architecture, Professional Option in Architectural Structures
University of Illinois – Urbana-Champaign
Bachelor of Science, Architectural Studies
University of Illinois – Urbana-Champaign

Professional Affiliations:
Structural Engineers Association of Illinois
American Institute of Steel Construction
American Society for Civil Engineers
Council on Tall Buildings and Urban Habitat