He participated in the Nicaraguan and Salvadoran Revolutions in the late 70s, helped found the Nicaraguan section of the IWL, helped develop other Central American organizations and the Mexican section of the Morenoists. He was a delegate and member of the Presidium of the Morenoist international tendency in its different stages: Bolshevik Tendency of the Fourth International (1976–1980), Fourth International (International Committee) (1981) and International Workers League (Fourth International)—Liga Internacional de los Trabajadores (Cuarta Internacional or LIT-CI) from 1981 to 1988. After the collapse of the military dictatorship he travelled extensively around the Americas and Europe then became a leader of the Movement for Socialism (Argentina), from 1985-1988.