Chaisson was born and grew up in Houston, Texas and attended North Shore Senior High School.

[1] He became an immediate starter at defensive end for the Mustangs, leading Texas high schoolers with 15.5 sacks along with 50 tackles, including 13 for loss, and forced three fumbles and helped lead North Shore to the Class 6A Division I state championship game and was named first-team All-State by the Associated Press.

[2] Chaisson was named the defensive MVP of the game after recording two sacks, four tackles for loss, a blocked kick and a forced fumble in the game and making a game-saving tackle at fourth and goal to preserve a 21–14 win over Todd Dodge's Westlake High School.

[3] As a senior, Chaisson was named the 21-6A district defensive MVP as well as included on the Scout.com All-Midlands team and was invited to the 2017 Under Armour All-America Game.

[11] Chaisson was named the Defensive MVP of the 2019 Peach Bowl after a six-tackle, two-sack performance against Oklahoma.

[19] On May 1, 2023, the Jaguars declined the fifth-year option of Chaisson's rookie contract, making him a free agent in the 2024 offseason.