Marcos Peña (born March 15, 1977) is an Argentine politician, author and political scientist who served as Chief of the Cabinet of Ministers during Mauricio Macri's presidency.

In 2003 he helped the gestation of Commitment to Change, which would later be Republican Proposal, popularly known as PRO, a new party led by Mauricio Macri in the City of Buenos Aires.

[3] After the victory, thanks to his advice, Mauricio Macri began to introduce political, social and economic changes gradually and avoid using shock therapy.

[4] On December 28, 2017, he ordered a press conference where he, Nicolás Dujovne, Luis Caputo, and the president of the Central Bank of Argentina, Federico Sturzenegger announced the change in inflation targets.

In May 2013 he presented the book “We are: An open invitation.” A series of stories compiled by him and Alejandro Rozitchner, which brings together testimonies of leaders, officials and militants of the PRO.