Sergey Flerko competed in the 1996 Summer Olympics in Atlanta as well as in the World Championships in 1999 in Greece.
He participated at the 1996 Summer Olympics in the 108 kg event. He competed at world championships, most recently at the 1999 World Weightlifting Championships. The 1999 World Weightlifting Championships were held at Peace and Friendship Stadium in Piraeus, Athens, Greece from November 21 to November 28, 1999. Atlanta, Georgia, U.S. 
