News Argentina’s Grossi tapped to lead IAEA Rafael Mariano Grossi, Argentina’s ambassador to Austria, will become the sixth head of the Vienna-based International Atomic Energy Agency. By Cary O'Reilly - October 30, 2019 Rafael Mariano Grossi at an October IAEA meeting in Vienna to pick a new director general (AN/Dean Calma) You need to login to view this content. Please Login. Not a Member? Join Us