Professionally, he was a farmer, working on the "Piedra Colgada" farm in partnership with Alejandro Noemi Huerta, his brother-in-law, and participated in the local Agrarian Board, exploiting guano on the coast of Atacama.

In 1957 he joined the Christian Democratic Party and was elected MP for the cluster department of Copiapó, Chañaral, Huasco and Freirina for the period 1957-1961.

He did not complete the entire parliamentary term as a result of the military coup and the subsequent dissolution of the National Congress in 1973.

He was the Regional Ministerial Secretary of Agriculture, National Advisor of the Christian Democratic Party of Chile from 1994 until his death.

In 2007, the Christian Democratic Member (now the PRI), Jaime Mulet, introduced a bill authorizing a monument erected in honor of the "Life and Work of former Congressman Raul Barrionuevo Armandio."