The former Liberty Professionals coach is expected to arrive in Dar es Salaam tonight to conclude talks with the Tanzanian outfit.
Tetteh, who has previously coached the Black Stars of Ghana and the Amavubi of Rwanda, was initially loaned to Sierra Leone for three months after the search for permanent coach was put on hold by the football association.
That initial loan expired last October after Leone Stars were eliminated in the 2018 World Cup qualifiers by Chad.
The Sierra Leonean Football Federation extended his stay with the national team on interim basis with the hope of signing him permanently.
But the celebrated coach has landed a deal in Tanzania that can make him the highest paid club coach in the country.
He is expected to sign a two-year deal with the Tanzanian giants.