Gennadij Germanovich Sagalchik is a Belarusian-American chess grandmaster and coach.
Sagalchik is a former Belarus Junior Champion, and was awarded the Grandmaster title in 1994. In 2008, he tied for second place with Sergei Tiviakov at the IV Torneo Internacional Abierto de Ajedrez in Alajuela, Costa Rica.
Sagalchik has been a chess coach in Long Island since the 2010s. In 2015, four of his students played in the World Youth Chess Championship.
Sagalchik lives in Brooklyn with his wife Olga, who is a Woman FIDE Master. They have two daughters and a son.