Usa holds an M.A. in economics law from Chulalongkorn University and an LL.B. (2nd Class Honours) in business law from Chulalongkorn University. She is a member of the Lawyers Council of Thailand and the Thai Bar Association. Usa is a notarial services attorney. She started working at LawPlus in May 2007. She has extensive experience in corporate, commercial, foreign direct investment and intellectual property matters. She has advised clients on joint ventures, foreign direct investments, contract managements, commercial transactions, and trademark prosecutions in Thailand and in foreign countries. Usa has been recommended for corporate and M&A by The Legal 500 Asia Pacific, 2021 and 2022.