De Brienne began playing youth soccer at age three with Ottawa South United.[1][2] In 2013, he was invited by the Dallas Texans SC (an affiliate club of Ottawa South United) to attend trials with the Real Madrid Academy in Spain.[3] He played with the Ontario provincial team at the U14 level.[3] In March 2016, he had a week-long trial with English club Crewe Alexandra.[4] In August 2016, he joined the Vancouver Whitecaps Academy.[3][5]
University career
In September 2021, he began attending Carleton University, where he played for the men's soccer team.[6][7] He scored six goals in ten appearances, helping the Ravens capture the silver medal at the national tournament.[8] He was named the OUA West Rookie of the Year.[9] De Brienne was also named to the 2021 U Sports All-Rookie Team, as well to the national tournament all-star team.[10][11] He was also a nominee for the U Sports Lou Bilek Award (Rookie of the Year).[12]
In January 2022, he initially registered for the 2022 CPL-U Sports Draft, before withdrawing soon after on January 13.[20] Instead, on January 18, 2022, he signed a contract with CPL club Valour FC.[21][22] He scored his first professional goal on June 15 against Cavalry FC.[23] At the end of the 2023 season, he was nominated for the CPL Best Canadian U-21 Player of the Year award,[24] and eventually won it.[25][26] After the 2023 season, he chose to depart Valour, after declining an extension offer.[27][28] Over his two seasons with Valour, he scored six goals in 44 matches, across all competitions.[29]
On December 21, 2023, Atlético Ottawa announced the signing of de Brienne for the 2024 campaign, as the player signed a one-year deal with an option for another season.[30][31] On 13 April 2024, he made his debut in the season opener against York United FC.[32]
International career
In 2016 and 2017, he attended camps with the Canada U14 and U15 teams respectively.[33]
Personal life
De Brienne is the cousin of current NHL player Matthew Peca.[1]