Receiving a scholarship from the Portuguese Estado Novo dictatorship's Institute of High Culture, she then moved on to the Royal Ballet School in London at the age of 24.

She had a clear idea that it was necessary to train professional dancers and create a national ballet company to put dance at the level of other arts in Portugal.

[1][3][5] Two years after the Carnation Revolution in 1974, which saw the overthrow of the Estado Novo, Andermatt was asked by the writer David Mourão Ferreira, then the Portuguese Secretary of State for Culture, to develop a National Ballet Company.

[7] Performing in 2011 in a show called Maior, directed by her daughter Clara, she overcame her initial horror to dance barefoot for the first time in her life.

Other activities included making two films on dance for the Portuguese state broadcaster Rádio e Televisão de Portugal (RTP).