Career
He worked in the office of architects Alvar Aalto in 1959-1961 and Viljo Revell in 1961-1963. He founded his own architect"s office in 1965. Sipinen has taught at Helsinki University of Technology Department of Architecture.
Among Sipinen"s other best known works are the cultural centres for the cities of Espoo, Mikkeli, Imatra and Kuusamo.