Denys started teaching flute in 2003 while studying in conservatory of music in Lviv, Ukraine. His first teaching job was in Children's Music School and later (in 2006) in Lviv College of Music. During his studying and teaching Denys was also working in Lviv Philharmonic Orchestra as a principal flutist and later in Lviv Opera and Ballet Theater as a second flute/piccolo. From time to time Denys was having tours to Western Europe and South Korea with Lviv Philharmonic Orchestra which helped him meet a lot of other great musicians and get more experience as a musician. In 2010 Denys moved to the U.S. and the first thing he started doing here as a flutist was teaching private students. At the same time he has a lot of recitals in retirement homes, hospitals, Ukrainian Institute of Modern Art and other places in Chicago and surrounding areas.