He was fired from government in 2015.
The appointment is contained in a presidential decree published on Thursday.
MrBiyiti Bi Essam is well known for allegedly diverting into his account a huge part of the money disbursed to organize the visit of Pope Benedict XVI in 2009.
About FCFA 770 million was reportedly sent to his account, a sum which he reportedly payed back when the law was at his heels.
This appointment has raised much dust in Cameroon. Most people say the old system is simply being recycled. President Biya is known for calling back retired members of his administration.
The same complaint was raised when former Prime Minister Peter MafaniMusonge was called to head the Commission for the Promotion of Bilingualism and Multiculturalism several months ago.
Many othersare wondering if it implies that the regime has endorsed US President Trump’s recognition of Jerusalem as Israel’s capital.
Jerusalem is a highly disputed city between Israel and Palestine. Recently, Mr Trump successfully moved his country’s embassy in Israel from Tel Aviv to Jerusalem.