[1] He served as executive president of the Costa Rican Social Security Fund[1] during the administration of Miguel Ángel Rodríguez (PUSC), and later served as justice of the Supreme Court of Justice.

[2] He was also one of the notables elected by the government of Laura Chinchilla to issue a report on state reform.

Piza was a candidate for the Social Christian Unity Party from the Social-Christian Rebirth faction in the 2013 Social-Christian primary elections, being defeated by rival Rodolfo Hernández who, however, chose Piza as a vice presidential candidate after the convention had passed.

The appointment took place after an agreement between the Christian Social Rebirth and Calderonist Convergence factions.

[2] In the meeting for his choice were the one who was the campaign chief of Hernandez, Humberto Vargas, Carlos Araya Guillén and the candidate for deputy by Cartago, Jorge Rodríguez.