Educated University Católica. I.L.B., University de Chile, 1912.
Director of the Bank of Santiago, 1915-1923. Member of the Superior Council of the St. Vincent de Paul Society of Chile since 1918. Member of the legal firm of Foster and Yrarrázaval since 1920.
Attorney and legal consultant of Guggenheim Brothers, of the Braden Copper Company, and of the American Smelting and Refining Company since 1920. National deputy from the Department of Illapel, 1921-1924. National senator from the Province of Coquimbo, 1925- 1932.
Vice-president of the Conservative Party, 1926-1928. Director of the Lautaro Nitrate Company, Ltd., and of the Anglo-Chilean Nitrate and Railways Company since 1927. Director of the Asociaciones de Productores de Salitre y Yodo since 1928.
Director of the Compañía de Salitre de Chile, 1931-1933. Legal consultant of the above-mentioned nitrate companies since 1928. Member of the Superior Council of the Catholic University since 1928.
Legal consultant of General Motors Corporation since 1931. President of the commission charged with the drafting of the Mining Code, 1931. Legal delegate to the United States for negotiations concerning the nitrate industry, 1932.
Member legal firm Foster y Yrarrázaval, since 1920. Member superior council, University Católica, since 1928. Member Society Nacional de Minería, Colegio de Abogados, Academy de Ciencias Económicas.
Club de la Unión.
Married Ana Donoso Foster. Children: Joaquin, Ana, Gregorio, Maria Luisa, Inés, Teresa, Alfonso, José, Julia, and Paz.