Selma studied voice with Henny Diemer at the Utrecht Conservatorium and opera at the Dutch National Opera Academy. Addtionally, she studied in the Udo Reinemann’s Lieder Class and took master classes with artists including Sarah Walker, Henk Smit, Jard van Nes, Elly Ameling, Udo Reinemann, Rudolf Jansen, Helmut Deutsch and Roger Vignoles.
Selma Harkink collaborated on many opera productions. She was a member of the ensemble of the opera of Dortmund and performed as a guest soloist at Oper Bonn. She also sang various roles with the Nationale Reisopera in the Netherlands. In January 2008 she performed in the New Year concerts with Holland Symfoniaconducted by Henrik Schaefer and in 2009 she worked with the Limburg Symphony Orchestra conducted by Ed Spanjaard in production of Ravel’s L’enfant et les sortilèges. Selma toured the Netherlands with a Viennese Operetta Gala together with Marco Bakker, conducted by Jan Stulen. Additionally, she gave many concerts and sang in various oratorios.