Gary L. Hahn
mobile: 618-407-3372
Treasurer, Structural Department Head
B.S. Civil Engineering / 1981 / University of Illinois at Urbana-Champaign
M.S. Civil Engineering / 2011 / Southern Illinois University at Edwardsville

Professional Engineer: Illinois, Missouri, and Indiana
Structural Engineer: Illinois

Safety Inspection of In-Service Bridges (Program Manager)


Mr. Hahn has over thirty years of experience in the civil engineering field that includes over twenty years in consulting engineering and over nine years in precast prestressed concrete product sales and engineering.  

Projects include the analysis, design, and detailing of various structures and components employing the use of steel, conventional and/or precast prestressed concrete, masonry, and timber construction materials. Design experience includes buildings, bridges, multi-cell box culverts, water and wastewater facility structures, foundations and shoring, and various utility structures. Clients include the Illinois Department of Transportation, Illinois Capital Development Board, consulting engineers, architects, general contractors, county highway departments, municipal public works departments, other governmental agencies, and private entities.

Illinois Society of Professional Engineers
   (President of Ambraw Chapter - Multiple Terms)
American Society of Civil Engineers
Structural Engineers Association of Illinois

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