[1] He was appointed following the resignation of Bartolomé Blanche, as an alternative to installing another military regime.

[1][2] Assured by Oyanedel that the provisional government would hold elections and protect foreign interests, on 21 October 1932, the United States and Great Britain extended recognition to the government of Chile for the first time since the June coup against Juan Esteban Montero.

[citation needed] In 1927, he was appointed a member of the Supreme Court of Chile, and served as Chief Justice.

On 2 October, due to the garrison revolts in Antofagasta and Concepción, Blanche resigned his power to Oyanedel.

Nearly all of Oyanedel's work was to convene the general elections, which were won by Arturo Alessandri for his second term in office.