He came out as an oratorio soloist in J. S. Bach's Saint John Passion in 1998. His repertoire includes a wide range of musical styles from early baroque to contemporary music. A worthy performer of the oratorios of Bach, Beethoven, Haydn, Händel, Mozart and Verdi. In 2019, the Hungarian State Opera premiered with him a new staged performance of Händel's Messiah, Mozart's revised version.
In opera roles he appeared first in 2008, since when he has been a member of the Hungarian State Opera. During the years, his title-role singing in Béla Bartók's Bluebeard's Castle became emblematic, he sings it in many Hungarian and international performances successfully with the contribution of renowned conductors. In some of the countries during his tour around the world, the audience could listen to and watch this opera for the first time in his performance. Above all, on the CD published in 2018 for the centenary of the Bluebeard's Castle premiere, Krisztián Cser sings Bluebeard. Besides Bartók's opera, he has played other remarkable roles on opera stages.