Monsignor Marcelo Sánchez Sorondo is an Argentine Catholic bishop, the current Chancellor of the Pontifical Academy of Sciences and the Pontifical Academy of Social Sciences. He was consecrated as Titular Bishop of Forum Novum (Vescovio, Italy) by Pope John Paul II in 2001, and was made a member of the Pontifical Commission for Latin America in 2011 by Pope Benedict XVI.

His early work centered around an innovative examination of the primary function of the idea of participation in the core theological approach of St. Thomas Aquinas. Drawing upon recent developments in critical research into the structure of the thought of Aristotle, Sánchez Sorondo examined the different interpretations of this philosopher.

Having issued a long set of various publications in the sciences, Monsignor Sánchez Sorondo earned several honors such as the Légion d’Honneur of France in 2000. He was also decorated as Cavaliere di Gran Croce of the Italian Republic (1999), official of honour of the Légion d’Honneur of France (2000), Grão Mestre da Ordem de Rio Branco of Brazil (2004), Official of Austria (2004) and Knight of Chile (2006). He was appointed Chaplain Grand Cross of Merit of the Sacred Military Constantinian Order of Saint George in 2006 by Infante Carlos, Duke of Calabria and Vice-Grand Prior of the Order in 2008.

In 2019, the Pontifical Academy of Sciences, governors from the Pan-Amazon region and officials from the United Nations, among others, signed a declaration of commitment to sustainable development in the Amazon. The declaration consists of 14 pledges to “build together effective solutions for sustainable development of Amazonia.” Monsignor Sánchez Sorondo was one of the signatories.