In Barcelona she started to choreograph professionally, winning the 1st Prize at the 3rd Certamen Coreográfico de Madrid for the work En-Fim.
In 1991, she founded her own company in Lisbon, Companhia Clara Andermatt, producing in the same year Louca-Louca Sensação De Viver for the ACARTE (Animação, Criação Artística e Educação pela Arte) Festival.
The work of her company came to be referred to as Nova Dança Portuguesa (New Portuguese Dance), which was characterised by an absence of any particular style, the use of new movement techniques, introduction of elements of theatricality, and presentations in unconventional places.
[1] In 1994, Lisbon was the European Capital of Culture, and Andermatt was invited, together with choreographer Paulo Ribeiro, to produce work inspired by Cape Verde, a former Portuguese colony.
Andermatt returned to Praia, the capital of Cape Verde, in 2009 to work with the dance company Raiz di Polon.