In 2011 Hanna Sintschuk took part in a major international event for the first time, the World Youth Championships in Lille , where she was eliminated from the qualification with a hammer throw with 52.73 m. At the European Youth Olympic Festival in Trabzon , however, she won the gold medal with 59.48 m. In 2012 she took part in the Junior World Championships in Barcelona , but retired there, like many others, without a valid attempt in qualification. A year later she won the gold medal at the Junior European Championships in Rieti . She also won the bronze medal in the U23 classification at the European Winter Throwing Cup in Castellón de la Plana . In 2016 she won the gold medal at this competition in Arad . She qualified for the European Championships in Amsterdam , where she finished 26th. At the Olympic Games in Rio de Janeiro , she reached the final , where she finished seventh with 71.90 m. In 2017 she qualified for the first time for the World Championships in London , where she finished tenth in the final with 69.43 m . Two weeks later, the student from the State University "AS Pushkin" Brest won the silver medal behind the Polish Malwina Kopron at the World Student Games in Taipei .
In 2016 she became the Belarusian hammer throw champion.