On 19 October 2016, he scored the winning goal for Rewa in their 2–1 victory against Suva in the National Football League match.
The following year, he played in his first FIFA World Cup qualifying match when he kept goal in the 4–2 victory over Papua New Guinea on 12 May 2004.
During qualification for the 2010 World Cup in South Africa, Tamanisau became embroiled in controversy when he was denied entry to New Zealand to play a Second Qualifying Round tie.
[6] He was stopped at customs because his father-in-law, a military police officer, had been involved in the 2006 Fijian coup d'état.
[7] Following this match, Tamanisau spent over two years out of the Fiji team before returning to make seven more appearances for his country during 2011.