After graduating from the Eva Jaczová Dance Conservatory in Bratislava, Mario Radačovský joined the Ballet of the Slovak National Theatre in 1989. Within a short period of time he became a Principal Dancer. Indisputable proof of his extraordinary talent was the 1st prize in the Czechoslovak Ballet Competition in 1990.
In 1992 he was invited to dance with Jiří Kylián’s Netherlands Dance Theatre in The Hague. During his seven years with the Company he had the opportunity to work with world-renowned choreographers including Jiří Kylián, Mats Ek, Nacho Duato, Ohad Naharin, William Forsythe, Édouard Lock, Hans van Manen, Paul Lightfoot, Johan Inger and Paul Ribeiro. In 1999 he accepted the offer to become Principal Dancer of Les Grand Ballets Canadiens in Montreal, Canada.
Radačovský began choreographing in 2002. His debut was a work called The Letter. His other works include: Passage à l‘eau trouble(2002), Valse and Inspiration (2003), Bolero (2004), Shadows and Lights (2005), Balansoire (2006), Meeting with a Swan and Soufflé des oiseaux (2007). For the Ballet of the Slovak National Theatre he created Change (2005), Warhol (2007) and 68 (2008). In April 2009 he premiered two new works: A Dinner, presented by the Magyar Ballet Színház in Budapest, followed by a duet Ulrich for the National Theatre Brno. In late 2009, the Ballet of the Slovak National Theatre premiered his second feature ballet titled Everest. In the 2010/2011 season, two of his feature works were premiered: María de Buenos Aires with the National Operetta Theatre in Bucharest, Romania, and Romeo and Juliet with the Grand Rapids Ballet in Michigan, USA where he was resident choreographer for the 2011/2012 season. In 2011, Radačovský also created the choreography for Claude Debussy´s The Toy Box played by the Montreal Symphony Orchestra and conducted by Ken Nagano. For Ballet Bratislava he created the works Romeo and Juliet, Three Duets and most recently, the very successful ballet Queen. His works have also premiered with the Diablo Ballet in San Francisco and the Latvian National Ballet. In 2013 he choreographed True Love for the Ballet of the National Theatre Brno.
Mário Radačovský served as Artistic Director of the Ballet of the Slovak National Theatre Ballet from 2006 until May 2010. He was also the founder of Ballet Bratislava, which later operated under the name of Dance Company of the New Stage Bratislava (Taneční soubor divadla Nové scény Bratislava). Since the 2013/2014 season, he has been Artistic Director of the Ballet of National Theatre Brno.