Denis was born in 1981 in Crimea (now Ukraine). In 1991, he was given a place at the Moscow Central Special Music School, where he studied with Professor Y.N. Dolzhikov. Since the age of 11, Denis has played in Russia's premier concert halls, such as the Big Conservatoire Hall and Tchaikovsky Concert Hall. With the support of the "New Names" International Charity Foundation and the Vladimir Spivakov Foundation, he played as a soloist in concert tours to over 20 countries in Europe, Asia, South America and USA. After graduating from the Moscow Central Special Music School in 2000 he went on to study at Royal Academy of Music with Professor William Bennett (OBE) in London. After his graduation in 2004, gaining a record 99% mark and the DipRAM diploma for an outstanding Final Recital, the Royal Academy of Music awarded Denis the "Principal's Award" as well as the "Fellowship Award" for the 2004-2005 academic year, which involved him giving lessons and classes for flute students at the Royal Academy. In 2006, the Academy awarded Denis with the prestigious title of ARAM (Associate of the Royal Academy of Music). During his time in London, Denis freelanced as Principal Flute with the Philharmonia of London, Leeds Opera North, Frankfurt Radio Symphony and Russian Orchestra of London.
Just a year after graduating from the Royal Academy of Music, Denis gained his first job as Principal Flute with the Tampere Philharmonic Orchestra in Finland, where he also taught at the Tampere Conservatory of Music for 3 years. In 2008 he was appointed Principal Flute with the Barcelona Symphony Orchestra and later that year he won the highly coveted position of Principal flute with the Metropolitan Opera, New York.
For the past few years, Denis has been William Bennett's teaching assistant at his International Summer Schools in Farnham (UK) and Chicago (USA). They have also recorded J.S. Bach Double Concerto with the English Chamber Orchestra for the BEEP label and performed joint concerts together in Japan's premier concert halls.
As a soloist, Denis has performed with many orchestras, including the Moscow Symphony Orchestra, Moscow Philharmonic Orchestra, "Moscow Virtuosos", Prague Chamber Orchestra, Ensemble of Tokyo, Odense Symphony Orchestra, Munich Chamber Orchestra, Chamber Ensemble of Paris and Tampere Philharmonic Orchestra. He has also given recitals at the British Flute Society Conventions in York (2004) and Manchester (2006 and 2008), Headliner Recitals in the National Flute Association Conventions in San Diego (August 2005) and Albuquerque (2007), and has also played a recital in the Tokyo Flute Convention 2007. Following the success of these recitals, he has been invited to play at the NFA 2009 convention in New York and BFS 2010 convention in Manchester.