Tahi was born on 24 July 1944 in the small town of Losingoiburie on Aoba Island.
[1][self-published source] After some years in civil service, Tahi entered politics in 1979 when he ran for and won a seat on the Aoba Islands Subcommittee.
He briefly served as acting president of Vanuatu in January 1991 after Ati George Sokomanu was removed from Office by the Electoral College due to gross misconduct.
[3] He began to see some opposition due to a perceived failure to initiate projects in his constituency.
In the lead up to the 1998 parliamentary elections, Tahi was killed in a car crash.