The artist came to international prominence during concerts with the Orchestre Philharmonique de Radio France broadcast by French radio and medici.tv. She proved her mastery by being the first Pole to come away with the “Silver Baton”, i.e. Second Prize in the 9th International Grzegorz Fitelberg Competition for Conductors in Katowice (2012).
She also won Second Prize in the prestigious 59th Conducting Competition organised as part of the Prague Spring Festival (2007), and was a finalist of the Witold Lutosławski International Contest for Young Conductors in Białystok (2006) and a semi-finalist of the Orquesta de Quadaqués Conducting Competition in Barcelona and the Donatella Flick Conducting Competition in London (2008).
Marzena Diakun has performed as a guest conductor with, among others, the Czech Radio Orchestra in Prague, the Royal Liverpool Philharmonic, the Bournemouth Symphony Orchestra, the Orchestre Philharmonique de Radio France, the Orchestre National de Lyon, the Orquestra Sinfônica do Estado de Sao Paulo, the Nordiskakammarorkestern, Real Orquesta Sinfónica de Sevilla, Orquesta Sinfónica del Principado de Asturias, Göteborg Opera, Jenaer Philharmonie, the Polish National Radio Symphony Orchestra and leading Polish philharmonic orchestras. She has collaborated with such prominent artists as Martin Grubinger, Peter Jablonski, Andreas Staier, Ewa Kupiec, Truls Mork, Daniel Müller-Schott, Camilla Nylund, Klaus Florian Vogt, Catherine Wyn-Rogers, Nathalie Stutzmann, Sabine Devieilhe, Jean-François Lapointe, Agata Szymczewska, Linus Roth, Michael Guttman, Alena Baeva, and Konstanty Andrzej Kulka.
She graduated with distinction in symphony and operatic conducting from the Karol Lipiński Academy of Music in Wrocław, where she studied in the class of Mieczysław Gawroński. In 2006, she completed the postgraduate programme under the tutelage of Uroš Lajovic at the Universität für Musik und darstellende Kunst in Vienna.
In May 2015, she received the Marin Alsop Taki Concordia Conducting Fellowship which promotes the most talented women conductors in the world. In 2015 she received a scholarship from the Boston Symphony Orchestra to finance her internship as an assistant conductor at the Tanglewood Music Festival in the USA.
In 2017 she received the title of habilitated doctor. In 2016 she was awarded a “Paszport Polityki” in the classical music category.