The 28-year-old joins on a one-month loan from fellow Vanarama National League side Dagenham & Redbridge, and is eligible to make his debut this weekend at Torquay United.
Born in Forest Gate, N’Gala progressed through the West Ham United youth system before signing his first professional deal with the Hammers in 2008.
The centre-half then went on to enjoy loan spells at Weymouth, Milton Keynes Dons, Scunthorpe United and Plymouth Argyle, prior to making a permanent switch to the latter in May 2010.
N’Gala’s stay at Home Park was to only last a season however as the Pilgrims entered administration, which led to the defender being allowed to depart on a free transfer and join Yeovil Town.
Following a season at Huish Park, the defender joined Stevenage ahead of the 2012-13 campaign and went on to make 28 appearances which also included a brief spell on loan at Barnet.
A season on the South Coast was next on the cards, as N’Gala joined Portsmouth in August 2013, initially on a one-month deal which was soon extended until the end of the season.
After registering 31 appearances for Pompey, N’Gala signed for Barnet in a move which proved to be highly successful as he helped the Bees finish the 2014-15 campaign as Conference Premier champions and return to the Football League.
During his time at Barnet the defender amassed a total of 107 appearances, before moving to Eastleigh for an undisclosed fee in November 2016.
The spell was to last for just over two months however, as N’Gala left by mutual consent before joining Dover Athletic until the end of last season.
This summer saw the towering defender pen a two-year deal with Dagenham & Redbridge.