Meet the

Team

Patrick Hannigan, P.E.
President Emeritus, Senior Consultant

Patrick Hannigan, P.E. is the President  Emeritus of GRL Engineers, Inc. He has spent the vast majority of his engineering career focused on deep foundation design and testing. He received a Bachelor of Science degree in Civil Engineering from the University of Notre Dame, and a Master of Science degree in Civil Engineering from the University of Missouri-Rolla. He has published numerous technical papers and was the principal author for the 1996, 2006, and 2016 editions of the Federal Highway Administration manual “Design and Construction of Driven Pile Foundations”. He is a is a licensed professional engineer in 22 states and is a member of the American Society of Civil Engineers, Deep Foundations Institute, Pile Driving Contractors Association, and the Association of Drilled Shaft Contractors.