From 1997 to 2003 and since 2010, he represents Ukraine in the Joint Institute for Nuclear Research (JINR) in Dubna, Russia.
On July 19, 2000, scientists at Dubna (JINR) detected a single decay from an atom of livermorium following the irradiation of a Cm-248 target with Ca-48 ions.
He studied also a visiting scholar at several major physics centers around the world: Joint Institute for Nuclear Research, JINR (at Dubna in Russia), Joint Institute for Laboratory Astrophysics, JILA (Boulder, Colorado, USA), International Centre for Theoretical Physics, ICTP (Trieste in Italy), and the University of Pittsburgh, (Pittsburgh, Pennsylvania, USA).