The Dutch soprano, Nienke Oostenrijk, studied at the Sweelinck School of Music in Amsterdam. She already passed her doctoral examination in Conservatory in Amsterdam. It was there that she gained the ‘Uitvoerend Musicus’ (performer’s) diploma in 1993 with Margaret Honig. Since then she has been pursuing her studies with Cora Canne Meijer. She took part in master-classes with Arleen Augér, Elly Ameling, Robert Holl and others.
Nienke Oostenrijk appears in opera roles as well as on the concert platform, and has sung throughout Europe but has spent most of her time in The Netherlands and a good deal of time in Germany. Her opera repertoire includes several roles that belong to the repertoire of high sopranos. With several companies she had sung the role of Konstanze in W.A. Mozart’s Die Entführung aus dem Serail. Other roles include Pamina in W.A. Mozart's Die Zauberflöte, Sophie in Strauss’ Der Rosenkavalier and Tebaldo in Verdi's Don Carlos, with the conductors like Kees Bakels, Marc Soustrot, Friedrich Haider and Carlo Rizzi.
Apart from being an opera singer Nienke Oostenrijk is a much sought-after Lieder singer and concert soloists. J.S. Bach’s St Matthew Passion (BWV 244) brought her to Berlin Konzerthaus. A series of performances throughout the Netherlands of W.A. Mozart's Requiem with Jaap van Zweden conducting was followed by Giovanni Battista Pergolesi’s Stabat Mater in the Berlin Konzerthaus, conducted by Jac van Steen. Increasingly she is also active in the field of 20th-century classical music, performing in the works of composers like Arnold Schoenberg (Second String Quartet), Jeff Hamburg and Igor Markevitch.