July 2016


Margaret (Peggy) Hagerty Duffy, P.E., D. GE
President, Hagerty Engineering, Inc.
Technical Advisor, ADSC: The International Association of Foundation Drilling

Peggy Hagerty Duffy, P.E., D. GE, graduated from the University of Louisville in Louisville, Kentucky, with a Bachelor of Science in Civil Engineering degree in 1989 and a Master of Engineering in Civil Engineering degree with a concentration in geotechnical engineering in 1990. She worked for several consulting firms before starting Hagerty Engineering in 1997 in Jeffersonville, Indiana, in the metro Louisville, Kentucky, area.

Peggy has experience with both deep and shallow foundations for a wide variety of structures, including municipal facilities, wastewater treatment and water treatment plants, multi-family and single-family housing, industrial complexes, and many others.  She also has experience with tunnel and dam design and with dam remediation, as well as slope stability analysis.  She has extensive experience in karst terrain and has worked on hundreds of projects involving sinkhole treatment and design and construction of structures over sinkholes.  She also worked for over 10 years designing foundations for cellular towers and observing construction of those towers in remote locations.  Peggy has served as the Technical Advisor for the ADSC, the International Association of Foundation Drilling, since 2013 in addition to her consulting work.