Born into a political family, his father was Luis Hierro Gambardella, former Minister of Education and Culture and Parliamentarian, while his grandfather, Luis Hierro Rivera, was National Representative. Member of the Colorado Party, Hierro López served as National Representative, Senator and as Ministry of the Interior.
Hailing from a politically influential background, his father was Luis Hierro Gambardella, a former Minister of Education and Culture and Parliamentarian, while his grandfather, Luis Hierro Rivera, held the position of National Representative. As a member of the Colorado Party, Hierro López went on to serve as National Representative, Senator, and Ministry of the Interior.