Josaia is the Team Leader for the Research, Communication and Training Unit at the Fiji Council of Social Services (FCOSS) based in Suva. Before joining the FCOSS secretariat in 2020, he was a research officer at the Office of the Leader of Opposition in the Parliament of the Republic of Fiji supporting the Leader of Opposition and Members of Parliament with policy research and advocacy.

Josaia is a passionate youth leader who has worked on diverse advocacies including; good governance, democracy, human rights, rule of law, climate change, disaster risk reduction and gender among others. At the regional level, Josaia is a member of the Pacific Youth Forum Against Corruption, an affiliate of the Pacific Youth Council advocating for good governance, and a united Pacific free of corruption.