Jackson Sousa began his Brazilian Jiu-Jitsu journey at age 10, training within a social project in Rio de Janeiro's Cantagalo favela. Under the guidance of renowned coaches Ricardo Vieira and Fernando "Tererê" Augusto, Sousa developed a strong technical foundation. Initially mentored by coach Leandro Martins from white to blue belt, Sousa later transitioned directly to Ricardo Vieira, who ultimately awarded him his black belt.

In 2021, Sousa departed from Checkmat to establish his own academy, Cantagalo Jiu-Jitsu London. As head instructor, he emphasizes a training ethos deeply rooted in his favela upbringing and grappling heritage. This new chapter allows Sousa to impart his unique philosophy and technical approach to students, enriching London's Brazilian Jiu-Jitsu community.

Jackson Sousa is widely recognized for defying heavyweight stereotypes through his agile and dynamic guard game. His technical versatility is highlighted by his successful execution of advanced techniques, notably the inverted "kiss of the dragon" sweep, in high-level competition. Sousa frequently employs the Single Leg X-Guard, smoothly transitioning into Toe Hold submissions, demonstrating an innovative and tactical approach uncommon among heavier competitors.

In 2021, Sousa faced serious allegations of misconduct, resulting in a temporary suspension from Checkmat and the termination of his sponsorship with Shoyoroll. By late 2022, he was officially exonerated, enabling him to fully resume competitive and coaching activities. Sousa successfully rebuilt his professional standing, re-establishing himself as a respected figure within the Brazilian Jiu-Jitsu community.

Beyond competition, Sousa co-owns Royal Camp, a premier European Brazilian Jiu-Jitsu retreat. This initiative hosts intensive week-long seminars featuring elite athletes in locations such as Amsterdam. Through Royal Camp, Sousa demonstrates his broader commitment to the growth and development of Brazilian Jiu-Jitsu, offering practitioners across Europe high-level training experiences and exposure to world-class instruction.

Following his relocation to Europe, Sousa experienced renewed competitive success on the Abu Dhabi Pro circuit. He secured prestigious titles, including gold at the UAEJJF Grand Slam and victory at the King of Mats championship. Additionally, Sousa headlined a 2024 ADXC super-fight representing his own academy, Cantagalo Jiu-Jitsu London, further cementing his status as a leading competitor on the international stage.