Gerard J. "Gerry" Carty, 91, a veteran New York City area engineer and contractor executive whose 65-year career included more than two decades of leading the Moles—an influential group of U.S. heavy construction professionals—died April 9, the organization confirmed.

Carty understood the challenges, rewards and importance of tunnels, foundations, sewer lines, dams and related infrastructure—and the skills needed for those who design, build and manage them.