But the Under-20 World Cup winning coach has also been given responsibility for the Olympic team and the Championships of African Nations squad.
The deal takes immediate effect with Tetteh due to take charge of his first game against Eritrea on March 13th in a Championships of African Nations qualifier enroute to the 2011 tournament in Libya.
Tetteh told KickOffGhana.com he is attracted by the challenge of taking Rwanda's football one step up.
“The main target is to ensure we qualify for the 2012 Nations Cup and that is a huge responsibility I am ready for. I am attracted by the nature of the challenge and risk involved.”
Rwanda's only previous qualification for the continental showpiece event came in 2004 when they beat Ghana under Tetteh's previous boss Ratomir Dujkovic.
The All Africa Games which is reserved for the Under-23s is also a competition Tetteh must qualify for and he insist they are all within his grasp.
“The good thing is that a lot of the players for the senior side fall within the Olympic level so it weaves into each other. I want to ensure that during my time here, the quality of football goes a notch higher and that I am very confident I can.”