Guilherme Cordiviola was born on February 20, 1992, in Jacarepaguá, a neighborhood in the West Zone of Rio de Janeiro, Brazil. His martial arts journey began at age 6 on the judo mat, where he absorbed the foundational grappling principles — balance, leverage, and positional awareness — that would underpin his development as a competitor.

After a period away from the mats, Cordiviola returned to grappling as a teenager through an unlikely source: the popular Brazilian soap opera Malhação, which reignited an interest in combat sports among many young Brazilians at the time. At 12, he began training Brazilian Jiu-Jitsu at Merck Fight Club/Escola de Lutas under coaches Sergio Henrique Miranda and Leonardo Gonçalves. The disciplined environment at the gym gave Cordiviola a strong technical base and cultivated the consistency and dedication that would define his long-term growth in the sport.

Cordiviola's ascent through the belt ranks at Merck Fight Club/Escola de Lutas reflected steady, deliberate technical growth under Sergio Henrique Miranda and Leonardo Gonçalves. His progress earned him more than promotions — by purple belt, he had already taken on coaching responsibilities at Miranda's gym, a testament to the technical maturity and leadership he demonstrated at a relatively young stage of his career.

At the higher belt levels, Cordiviola expanded his development by working extensively with coach Alexandre Baraúna and Master Júlio César, both of whom left a significant imprint on his game. His brown belt career peaked with a bronze medal in the ultra-heavyweight division at the 2017 IBJJF World Championship — a result that signaled his readiness for the sport's highest level. Alexandre Baraúna awarded Cordiviola his black belt shortly after, recognizing not only his competitive achievement but also his contributions as a practitioner and coach.

Perhaps the most distinctive thread running through Guilherme Cordiviola's story is the context in which his success has been built. Maintaining a full-time career in the banking industry, Cordiviola has navigated the demands of professional life while competing at the highest levels of international BJJ in the Pesadíssimo division — the ultra-heavyweight category for athletes over 100.5 kg (222 lbs). Representing GFT academy, he has established himself as one of the team's premier competitors in that weight class on the international circuit.

His black belt results speak directly to the quality of his preparation and the efficiency of his training. In 2018, he claimed gold at the CBJJ Brazilian Nationals, one of the most competitive domestic tournaments in the sport. In 2023, he added two IBJJF American Nationals titles — one in the gi and one in no-gi — further cementing his standing as an elite-level heavyweight. Taken together with his brown belt podium finishes and the 2017 IBJJF World Championship bronze that preceded his black belt promotion, these results trace a consistent upward trajectory across multiple years of competition. Cordiviola's career stands as a compelling example that elite-level success in Brazilian Jiu-Jitsu is attainable without the full-time dedication typically associated with the sport's top competitors.