[5][7][8] His swim club is Hapoel Hod Hasharon, and his coaches are Zohar Galili, Nikita Shkilenko, Tom Rushton, and David Marsh.

[10] At the 2018 European Junior Swimming Championships in July 2018 in Helsinki, Finland, at 16 years of age he won a gold medal in the 4×200 m freestyle relay with Denis Loktev, Bar Soloveychik, and Tomer Frankel.

"[5] In October 2018, he competed in the Summer Youth Olympics in Buenos Aires, Argentina, finishing 4th in the 200 meter individual medley, an event that would remain a strength.

[12] At the 2020 Summer Olympics, Cohen Groumi competed in the men's 4×200 metre freestyle relay, finishing 10th with a combined time of 7:08.65 (as he swam 1:46.41 as the anchor).

[11][13] Perhaps his most significant event was when he swam fly on the 4×100m Medley Relay, where an 8th-place finish with a combined team time of 3:44.77 set a new Israeli record, which brought considerable national attention to the young swimmer.

[15] At the 2024 European Championships Mixed 4×100m medley relay in June he swam the fly and won a gold medal with Anastasia Gorbenko, Ron Polonsky, and Andrea Murez with a time of 3:45.74.