[1] Oliva was first elected to the Legislative Assembly of Samoa as a Samoan Democratic United Party MP in the 2006 Samoan general election.
[1] After the collapse of the SDUP he became a founding member of the Tautua Samoa Party, and in May 2009 was deemed to have resigned his seat by Speaker Tolofuaivalelei Falemoe Leiʻataua.
[3] In September 2010 he asked to run as a Human Rights Protection Party candidate in the upcoming election.
In July 2020 Oliva announced that he would contest Aiga-ile-tai in the April 2021 election as an HRPP candidate.
[1] He was subsequently banished from a number of villages in the constituency for unstated reasons.