Dmytro Hilei was born in Lviv in 2008. He completed the 10th grade of the Lviv Physics and Mathematics Lyceum in June 2024. Dmytro has had a deep passion for the exact sciences and mathematics since early on in his life, and a particular fascination for astronomy.

In 2024, Dmytro earned three absolute prizes in the All-Ukrainian Pupillary and two absolute prizes in the All-Ukrainian Students Olympiad in Astronomy and Astrophysics, securing first diplomas. Following these successes, he was invited to join the Ukrainian team selection for the International Olympiad on Astronomy and Astrophysics (IOAA). After successfully passing the selection, he qualified for IOAA 2024, where he competed in five tours: Theoretical, Data Analysis, Star Chart, Observation, and Planetarium. Dmytro's outstanding performance earned him a bronze medal. This experience allowed him to make new friends, engage with interesting individuals from around the world, explore new countries, and learn about different cultures, all while deepening his knowledge of astronomy and astrophysics.

In 2023, Dmytro also qualified for the IOAA Junior 2023, an international Olympiad for students under 16, where he won a silver medal—the best result on the Ukrainian team. Additionally, he participated in the All-Ukrainian Astronomy Fights, a tournament organized by AstroSandbox, where his team placed third. This event was an excellent opportunity for Dmytro to enhance his teamwork and leadership skills.

Dmytro has a wide range of hobbies, including mountain hiking, playing the guitar, and camping. He has been an active member of Plast, a Ukrainian scouting organization, for six years. In the summer of 2024, he successfully contributed to organizing a camp for children, providing them with an unforgettable summer experience.