Mampala joined the Academy at Everton at the age of 15 and went on to score 11 goals and pick up six assists during 18 appearances for the under-18s during the 2017–18Professional Development League season.[1] He turned professional at Goodison Park in July 2018 and signed another one-year contract in summer 2019.[1] He played four EFL Trophy games, however he was released in June 2020 after failing to establish himself in the under-23 team.[4] He joined Queens Park Rangers in October 2019 and was placed in the club's Under-23 team.[5]
In July 2023, Mampala joined Marine.[10] He returned to Hyde United on a one-month loan in January 2024.[11] With the loan having been extended until the end of the season, he was recalled on 22 April 2024.[12]