Tottenham born, Ntumba joined Celtic on loan from South Shields in January 2022 after signing for South Shields in the summer of 2021. He scored their third goal in their 3-1 win over Celtic earlier this season. Before joining The Mariners, Ntumba featured for Italian side ASD Angelana after previously being with Chorley in the National League. Ntumba spent time in the youth systems at Manchester United and Manchester City before joining Burnley and signing professional terms in 2015. Loan spells at York (3 appearances), Morecambe (10 appearances) and Wrexham (44 appearances and 6 goals) were followed by spells at Dover and RWDM47 in Belgium. After leaving South Shields, Ntumba joined Macclesfield, helping them secure promotion, and went onto play for Cypriot side, Digenis Morfu.