[1] His mentor Serge Stauffer (who translated Marcel Duchamp's writings into German) became a close friend.
[4] As a freelance journalist he published in different newspapers and magazines, and he was an editor at the Schweizer Radio und Fernsehen, a Swiss broadcasting company.
Together with his group The Nomads he participated in the documenta 8 in Kassel, Germany, in 1987,[5] and in the Olympic Arts Festival in Calgary, Canada, in 1988.
In 1997, Stirnemann initiated the project artist trading cards, a "collaborative cultural performance" which became a worldwide success.
[9] Another ongoing project is his subjective encyclopedia, a collection of comments, images and everyday poetry, each entry assigned to a distinct lemma.
2006-07 he was awarded a grant and a stay at the studio in Paris (Cité internationale des arts) from the city of Zurich.