Between 1999 and 2004, he served as attorney for the Department for the application and interpretation of International Tax Rules at the Chilean Internal Revenue Service (SII) and negotiator of agreements to avoid double taxation. In those years, the main agreements were negotiated and have been enacted in recent years.
He was a representative of Chile of O.E.C.D. (Organization for Economic Cooperation and Development) for the Global Forum on Taxation in Paris, France and in Mexico City, Mexico. Consultant to the IDB (Inter-American Development Bank) for Nicaragua and the Tax Administration of Peru (SUNAT).
He is a member of the Chilean Bar Association, the "International Fiscal Association" (IFA) and the Chilean Institute of Tax Law, where he was the President from 2013 to 2017.
Professor of Tax Law at Universidad Jesuita Alberto Hurtado. Director of the Program of Corporate and International Taxation at Universidad Alberto Hurtado. Professor at “Universidad de Santiago (USACH)” and "Pontificia Universidad Católica de Chile (PUC)" of International Taxation on the Tax Master Programs.
He has been an ad-honorem consultant of the Chilean Internal Revenue Service (IRS) from 2008 to 2014.