Then he completed his higher education at the Faculty of Agronomy of the University of Chile, where he obtained the title of agronomist with a mention in economics agrarian.

During his exile because of the military dictatorship, between 1984 and 1988, he was an Agricultural Development consultant for the FAO and the UNDP, working in Africa and Central America.

He started in politics when he joined the Christian Democratic Party (PDC) around 1964, in a full assumption of Frei Montalva as President of the Republic.

His figuration became notorious in 1969 when, together with other members of the community, they founded the United Popular Action Movement (MAPU), demonstrating their dissent from their former political establishment.

In 1972, he became secretary-general of the MAPU and in the government of President Salvador Allende, he was a member of the National Committee of the ruling Popular Unity (UP) coalition, until 1973.

[6] While he was abroad he made numerous unsuccessful attempts to enter the country until, in 1985, he returned definitively and joined the Socialist Party of Chile (PS), where he has been part of the Central Committee and, since 1990, of the Political Commission.

[7] In the 1989 parliamentary elections he ran for the Senate on behalf of the Party for Democracy (PPD), for the Tenth Senatorial District, corresponding to the VII Maule Region, for the 1990–1994 legislative period.

He was also part of the Chilean delegations to the World Interparliamentary Union in Copenhagen (in 1993) and to the United Nations General Assembly in New York (1994).