Ngamvoulou signed for Margate from then-National League South rivals Oxford City before last season`s signing deadline.
Ngamvoulou has plenty of non-League experience after starting his career in England at Staines Town following a spell in his home country with SO Romorantin.
After a period at Farnborough, the 28-year-old joined Whitehawk where he showed real promise in the attacking midfield role.
Loan spells at Hednesford Town and Boston United followed before he signed for Oxford City in December 2016.