He was a member of the National Parliament of Papua New Guinea from 1977 to 1992, representing the electorate of Ijivitari Open.
[1][2] Doi was a broadcast announcer with Radio Popondetta before entering politics.
He was Speaker of the National Parliament of Papua New Guinea and foreign minister in Paias Wingti's first government, and was a founding member of the People's Action Party.
[1] Following his 2002 defeat, he announced that he would no longer contest elections himself, stating that he would "leave it to a younger breed of leaders".
[11] In March 2006, he was appointed as a director of Port Moresby's water and sewerage provider, Eda Ranu.