For the last twenty years Søren K. Hansen has been the regular conductor of the vocal ensemble GAIA, which is well known as one of the best choirs in Denmark. He is also a regular conductor of the Århus Sinfonietta and works as a lecturer in choral and ensemble conducting at the Royal Academy of Music in Århus. In connection with his freelance work, he has conducted not only the Danish National Vocal Ensemble but also among others the Danish regional orchestras, Ensemble 2000, Ars Nova Copenhagen, Pro Coro Canada, the Danish National Choir and the Swedish Radio Choir. He has been artistic director of the Chorus of the Danish National Opera in Århus since 2003, and as an opera conductor he has often worked with the older, rarely heard repertoire or the brand new contemporary one. At the Danish National Opera he has headed several performances of contemporary music drama. In the classical opera repertoire he has conducted productions of among other works Monteverdi's L'incoronazione di Poppea and Saint-Saëns' Samson et Delilah.