[2] In 2011, Koulechov moved to the United States, where he enrolled at Sagemont in Weston, Florida, and played for the basketball team in the 2011–12 and 2012–13 seasons.
[3] Koulechov began his college career at Arizona State, where he averaged 3.7 points and 2.8 rebounds while shooting 43.8 percent from the field.
[4] In the 2016–17 season, Koulechov earned first-team All-Conference USA and Second Team NABC All-District 11 honors as a junior at Rice.
On April 17, 2019, Koulechov was loaned to Hapoel Holon for the rest of the season, joining as an injury cover for Guy Pnini.
In July 2013, he averaged 12.0 points and 4.6 rebounds for the U-20 squad, leading his team with a 93.5 free throw percentage as well as 1.7 steals per game.