In 2011 Dzianis Yantsevich graduated from the Nikolai Rimsky-Korsakov St. Petersburg State Conservatory (Academy) where he had majored in vocal art (academic singing). In 2013, he completed his studies for Master of Arts in Specialized Music Performance (Opera) under Hans Peter Blochwitz at the Swiss Opera Studio of the Bern University of Applies Arts/ Bern University of the Arts. In 2014, he completed his voice training under Bonaldo Giaiotti at the Orlando Mantovani International Music Academy in Milan.
From 2012 to 2013, he was a soloist of the Theater Orchester Biel Solothurn.
In 2015, Dzianis Yantsevich joined the young artists programme of the opera company of the Bolshoi Theatre of Belarus, followed by his promotion to soloist of the opera company in 2016.
In September 2021, he appeared as Schaunard in La bohème (Philipp Himmelmann’s production) at Perm Opera and Ballet Theatre.
In April 2024, he took part in the Days of Belarusian Culture in Azerbaijan.