Having obtained a diploma in English and Social Studies from the Solomon Islands College of Higher Education, he worked as the principal of a secondary school before entering politics.
[1][2] He attracted attention by defeating the incumbent, veteran politician Sir Allan Kemakeza, who had been seeking a sixth term in Parliament.
[7][8] As minister, he co-organised the participation of ten Solomon Islanders in "an eight weeks course on gender at Flinders University" in Australia.
Sikua alleged that Mua had done so under pressure from the Prime Minister and in contravention to the Attorney General’s advice.
Mua denied the claim, saying he had acted on the basis of his own judgment, and accused the Opposition of spreading misinformation.