[4] Boissy started the 2021–22 season in Spain for CB Cornellà of the third level LEB Plata, making his debut in October 2021.

[7][4] Boissy played with Douanes in the 2023 BAL season, where he a crucial role in the final game day win over defending champions Monastir, as he had 15 points and 11 rebounds and 7 assists.

In the semi-final against Petro de Luanda on 25 May, Boissy scored 28 points to surprisingly lead Douanes to their first-ever BAL final.

[1] In the final, Boissy scored 20 points but Douanes fell short of the title as they lost to Al Ahly.

[8] In June 2023, he signs for the French team Aurore Vitré Basket, which plays in the third division Nationale Masculine 1.

[11] Boissy was named to the BAL All-Defensive Second Team, and averaged 10.9 points, 5.0 rebounds and 4.9 assists for the season as the Douanes were eliminated in the quarterfinals by eventual champions Petro de Luanda.