In February 2023, he won two silver medals at the OMEGA Youth Series Competition in men's skeleton event.

[3] He competed at the OMEGA Youth Series Competition, held in Innsbruck and Pyongyang in November 2023, where he received silver and bronze medals in men's skeleton event.

[6] At the 2024 IBSF World Junior Championships, held in Lillehammer, Norway, Yaroslav won a bronze medal in men's skeleton event.

[7] Then he represented Ukraine at the 2024 Winter Youth Olympics, held in Gangwon, South Korea and won a silver medal in men's skeleton event.

[11] On 31 January, Lavreniuk won a bronze medal in men's skeleton at the European U20 Championships in Sigulda.