He started as professional in 1973 as an Economy Researcher in the Central Bank of Uruguay.
Since 1977 he is Partner in BDO Estudio Héctor Defféminis, advising professionally to local and foreign clients. He is currently the Partner in charge of the Business Consulting and Financial Advisory Services.
From 2008 to 2013 he was Regional Coordinator of BDO Latin America.
Member of the Fiscal Commission of Lideco (Commercial Defense League).