Klaus studied singing, organ and choir conducting. His professional singing career began in opera and as a concert singer, performing internationally in leider, opera and oratorio. Since 1986 Klaus has taught singing at leading music and drama schools in Copenhagen, including the Preparatory Conservatoire Course, The Music School and the Danish Musical Theatre Academy. He has also hosted workshops for choir directors at the Danish Amateur Choir Association and teaching regular courses at the Danish Actors’ Association.

Klaus first began working with the Estill Voice Model in 1999 and in the summer of 2003 he was granted his Masters Licensure by Jo Estill. He is now a Certified Course Instructor with Testing Privileges and he sits on the Advisory Board for Estill International.
Klaus works as a vocal coach at several theatres in Copenhagen. He has coached shows including The Phantom of the Opera, Cats, Beauty and the Beast, The Producers and Chicago.

In his private studio, he coaches singers in musical theatre and opera, actors and recording artists. His students are working in theatres across Denmark, Sweden and in London’s West End. Klaus is also experienced in the rehabilitation of singers, actors, public speakers and broadcasters with injured or damaged voices.