The Dutch mezzo-soprano, Mirjam Schreur, obtained her diploma's Performing Musician Solo-singing en Music-drama (opera-class) at the Conservatorium Maastricht with Barbara Schlick. Since September 2000, she is being coached by the Dutch mezzo-soprano Jard van Nes. With Roberta Alexander she worked on roles of Mozart operas. She took Lied master-classes from Rudolf Peirnay, Maureen Lehane, Semjon Skigin and Jard van Nes/Ulrich Eisenlohr. At the "Musikhochschule Köln" she took seminars in ancient music: "Monteverdi and his contemporaries" by Paul Esswood and by Gerhard Darmstadt. In April 2002 she was rewarded with the 3rd prize in the international singers competition "Debüt in Merano" in Italy.
As an oratorio singer Mirjam Schreur worked together with the Nederlandse Bachvereniging conducted by Jos van Veldhoven in a world-premiere of Der Tod Jesu by C.E. Graaf. This concert took place during the "Nederlandse Muziekdagen 2007" in Vredenburg, Utrecht. This concert was recorded and broadcasted by NPS radio. She also took part in a project called Music for Royalty conducted by Jos van Veldhoven. On the programme were cantatas BWV 134a and BWV 208 by J.S. Bach. In the spring of 2007 she worked together with the North Netherlands Orchestra in a series of 6 performances of the St. Matthew Passion (BWV 244) by J.S. Bach, conducted by Johannes Leertouwer. In October 2007, she took part in a series of concerts in Germany and Luxemburg together with the Dresdner Kreuzchor and the Dresdner Philharmonie conducted by Roderich Kreile. In December 2009, she made her debut at the Concertgebouw in Amsterdam with the Messiah by George Frideric Handel. In the spring of 2009, she did a series of 3 performances of the Stabat Mater by G.G. Brunetti, together with the Combattimento Consort Amsterdam conducted by Jan Willem de Vriend. Later that year she was invited to take part in the festival Europa Cantat 2009 in Utrecht with Misa Tango by M. Palmeri and Le Roi David by Arthur Honegger. She was also invited to take part in the Barocco Festival Leonardo Leo in Brindisi, together with the Baroque orchestra Il Concerto Barocco, directed by Jonathan Talbott. On the programme were the alto cantatas BWV 54 and BWV 170 by J.S. Bach.
As an opera singer Mirjam Schreur performed the role of Orfeo in October 2004 in the opera Orfeo ed Euridice by Gluck in Merano, Italy. In the previous year she already performed there the role of Marcellina in the opera Le Nozze di Figaro by Mozart. In a scenic production in the Theater Bonbonniere in Maastricht, the Netherlands, she played the role of Dido in the opera Dido and Aeneas by Purcell. With "Opera Zuid" she played the role of Beggar-woman and Russian mother in the opera Death in Venice by Benjamin Britten.
In contemporary music Mirjam Schreur sang in the world-premiere of Cantico Espiritual of the Dutch contemporary composer Jo van den Booren and of Cantate Domino by the German contemporary composer Werner Jacob in Nürnberg. Recordings were made by Dutch and German radio.