Radix began his career as a referee in 2010, by overseeing matches at the local GFA Premier League, Grenada's top flight category.[1]
In January 2017, Radix, who had been working as a teacher at the St David's Catholic Secondary School in Saint David Parish, was selected by CONCACAF to attend an intensive two-phase training to choose 14 referees of excellency to represent the confederation.[1] The course took place in Toluca, Mexico, and was organized by the Mexican Football Federation.[1] At the time of being chosen by CONCACAF, Radix was pursuing a career as a national long distance athlete.[1]
At CONCACAF level, he has led games for the qualification for the 2022 FIFA World Cup, with matches between notable national teams, as in October 2021, when he refereed a 4–1 United States victory over Jamaica national football team.[3] The subsequent year, Radix was again chosen by CONCACAF to attend a prestigious Referee Academy at the Dallas Cup, where he was appointed to officiate U-19 matches.[4] Radix has also refereed matches for the CONCACAF qualification for the 2026 FIFA World Cup.[5][6]
Among Radix's most important CONCACAF performances are the third-place match of the 2019–20 CONCACAF Nations League between Honduras and Costa Rica, which ended in a Honduran victory on penalties.[7] He also oversaw the final game between Cibao FC and Violette AC at the 2022 Caribbean Club Championship.[8] In the same year, Radix took part in the CONCACAF U-20 Championship,[9] and performed in four CONCACAF Gold Cup editions; first as a sponsored referee for training at the 2019 tournament,[10] followed by a main role at the 2021 Gold Cup,[11] as a support referee in the 2023 tournament in Canada and the US,[12] and again in a supporting role in 2025.[13][14] For this last edition, Radix also whistled games during the qualification process.[15]
