Career
He served as the president of Ecuador between 1956 and 1960. Ponce initially ran in the presidential election of 1948, but only came in third place. In 1951 Ponce, along with Sixto Durán Ballén founded the Movimiento Social Cristiano (Mediterranean Shipping Company), which later became the Partido Social Cristiano (Christian Social Party).
He ran a final time in the election of 1968, once again coming in third place.