The Collegium Musicum is composed of members of Freie Universität and Technische Universität Berlin. Currently more than 400 students and other members of the two universities perform in one or more of the five ensembles: full choir, chamber choir, symphony orchestra, chamber orchestra, and the Berlin Uni Bigband. Donka Miteva is the director of Collegium Musicum.

The program with which choirs enter the International May Choir Competition is subject to strict criteria. For example, there must be one piece by a contemporary composer from the country of origin of the choir as well as one piece by a composer from the country where the competition is held – in this case Bulgaria – which the organization team assigns to the choir.

Donka Miteva was born in Sofia, Bulgaria, and started piano and singing lessons at an early age. She studied choral and orchestral conducting in Sofia. After receiving a diploma from the Pancho Vladigerov National Academy of Music, she enrolled at the Robert Schumann University of Music and Media in Düsseldorf, where she worked under Professor Lutz Herbig in the conductor program, graduating in 2007. During this period she received numerous grants, including ones from the European Academy of Montepulciano, the Accademia Musicale Chigiana in Siena, and the Richard Wagner Association in Düsseldorf. Donka Miteva attended numerous master classes, and concluded her musical training with several musical assistantships. She worked with various orchestras, including the Sofia Festival Orchestra, the North Czech Philharmonic, the Berlin Sinfonietta, and the Savaria Symphony Orchestra. From 2007 to 2011 she was the choir director and chief conductor of the Municipal Theater of Münster. In June 2011 she received an award from the Society of Music and Theater Lovers of the city of Münster in recognition of special artistic achievements.