[2] Mariya Stadnik competed at the European Junior Championship, which took place in August 2003 in Seville, Spain.

In the final match of the tournament, Stadnik won the victory over the representative of Romania Alina Pogachan and became the winner of the European Junior Championship.

[4] The next tournament in which Stadnik competed was the Junior World Championship, which took place in July 2005 in Vilnius, Lithuania.

In this match, Stadnik won ahead of time (1:44 minutes) over her rival and reached the semi-final stage of the tournament.

Having defeated her opponent in 2:50 minutes with a score of 8:0, 16-year-old Mariya Stadnik became the winner of the World Junior Championship.

[6] However, in June 2006, International Wrestling Federation (FILA) reported that Furosemide, a prohibited drug, was found in the blood test taken from Mariya Stadnik, and she was deprived of her gold medal at the European Championship.

The coaches of the team said that 18-year-old Mariya Stadnik was young and inexperienced, and Iryna Merleni would go to the World Championship in September.

Maria Kachina from Russia, Olesya Zamula from Latvia, and Yulia Ratkevich from Belarus were recruited to the Azerbaijani national team.

The Azerbaijan Wrestling Federation (AWF) also invited Mariya Stadnik to compete in the Azerbaijani national team.

Mariya Stadnik competed in the tournament held at the Heydar Aliyev Sports Arena on 21 September.

At this stage, her rival was Chiharu Icho, a representative of Japan, who was a finalist of the 2004 Athens Olympics, this meeting took place in an atmosphere of intense sports struggle.

[11] Competing in the freestyle – 48 kg weight class, she won gold at the 2008 European Championships in Tampere and bronze at the 2008 Summer Olympics in Beijing.

[16][17] In 2022, she won the gold medal in the 50 kg event at the 2021 Islamic Solidarity Games held in Konya, Turkey.

[18] She won the gold medal in the women's 50 kg event at the 2023 Dan Kolov & Nikola Petrov Tournament held in Sofia, Bulgaria.

[19] She won the gold medal in the women's 50 kg event at the 2024 European Wrestling Championships held in Bucharest, Romania.