Honored Worker of the Republic of Kazakhstan, Honored Worker of Education of the Republic of Kazakhstan, Professor at Kazakh National University of Arts. She graduated with honors from the Republican Special Music School named after Kulyash Baiseitova in the class of Professor N. M. Patrusheva and the Saint-
Petersburg’s Postgraduate School (Leningrad) State Conservatory in the class of M. Weiman and M.Belyakov professors.

Over the years, she worked as an artist of the State Symphony Orchestra of the Republic of Kazakhstan, deputy director of the Republican Music School named
after K. Baiseitova. Since 1998, in the position of Vice-Rector for Academic Affairs, she has been actively involved in creating Kazakh National Academy of Music in Astana. Then she was the pro-rector for the concert work and international relations. Students of Professor R.K. Mussakhajayeva are laureates of prestigious international contests: Youth Competition named after P. Tchaikovsky, competition named after A. Yampolsky, named after L. Beethoven in Vienna, named after Michelangelo Abbado in Milan, "Rovere dOro" in Italy, competition of Zakhar Bron in Novosibirsk, “Astana violin”, “Shabyt” and others. They also work in prestigious orchestras and universities in Europe, America and Kazakhstan.

Since 1998 Professor has been conducting International master classes at the festival “Musica in Lagoon" in Venice, Italy, international master classes at the Ost West Musik fest in Vienna, Austria. R.K. Mussakhajayeva is a jury member of international competitions: named after A. Yampolsky in Moscow, named after Eduard Grach in Moscow, "Violin of the North" in Yakutsk, Russia, named after Michelangelo Abbado in Milan, Italy, named after L. Beethoven in Vienna, "Remember Georgi Enescu" in Bucharest, Romania, Astana-Merey in Astana.