Complex sentence: Daniel Muñoz, the private secretary and confidant of former Argentinian president Néstor Kirchner later also served for two years as an aide to Néstor Kirchner's wife, Cristina Férnandez de Kirchner, who was president of Argentina from 2007 to 2015.
Split into simpler sentences: Daniel Muñoz, the private secretary and confidant of former Argentinian president Néstor Kirchner. He later also served for two years as an aide to Néstor Kirchner's wife, Cristina Férnandez de Kirchner, who was president of Argentina from 2007 to 2015.