Managing Director of Triple Tee Enterprises (TTT), between 2006 and 2018 he served the Kiribati Chamber of Commerce & Industry (KCCI) as Secretary, Vice-President and President (2012-2016), for maximum terms.[2][3] When Matiota Kairo, the MP for Tamana, resigned in November 2018 for medical reasons, Tarati ran for by-election and was elected in March 2019 at the Maneaba ni Maungatabu. He joined the ruling Tobwaan Kiribati Party (TKP).
In 2020, he was re-elected with more than 86% of votes. He was then nominated as chairman of TKP until the presidential election of 22 June 2020.[4] He was one of four MPs elected unopposed in 2024.[5]