Hearts have signed the 28-year-old from Israeli club Bnei Sakhnin on a one-year deal, with a one-year option.
The French born defender has four caps for Congo, and was a starter for his last club, Greek side Platanias.
He previously played with Le Havre, Sedan and Dagenham and Redbridge.
He will provide Hearts with cover from Christophe Berra who is currently suffering from a hamstring injury.