The former Amavubi coach will maintain his current position with the Dansoman-based club as Felix Aboagye succeeds sacked J.E Sarpong
The former Rwanda coach was expected to be officially confirmed head coach of the team after J.E Sarpong was sacked last week.
According to the management of the club, the overhauling process eventually left Tetteh untouched.
The 2009 World Under-20 winning coach will still stay out of active coaching since quitting his job with the Amavubi in September 2011.
The former coach of the Liberty U20 team, George Lamptey, takes over as head coach of the team ahead of the 2012-2013 calendar.
He will be assisted by former Ah Ahly and Zamalek striker, Felix Aboagye, who maintains his position as assistant coach.