Guillermo studied Journalism at the Universidad Gabriela Mistral and received a PADE Certification from Universidad de Los Andes. Until April 2016 he served as Director of the newspaper La Tercera. He has 25 years of a successful career. He was President of the National Press Association, Director of Diario Financiero, Editorial Development Manager of Mega TV, Director of Capital Magazine and creator of Pulso newspaper. Since May 2016 is Corporate Affairs Manager in CMPC.