[1] He was elected to the Swiss Federal Council on 7 December 1977 as member of the Social Democratic Party from the canton of Neuchâtel.

From 1974 to 1977, he belonged to the Parliamentary Assembly of the Council of Europe and was rapporteur for the admission of Portugal.

[1] He stood for a Swiss active policy in general and in the Human rights field in particular.

[1] Aubert visited four African countries and signed a declaration against apartheid in Nigeria in 1979.

[1] He was the first Swiss foreign minister to establish contacts with the PLO leadership when he received Faruk Kaddhumi in July 1980 in Bern.