Puangrat is a lecturer in the Faculty of Law at Thammasat University in Thailand. Her research focuses on citizenship, migration, statelessness, and refugees, with a particular emphasis on Southeast Asian countries. She has also strengthened her legal background through practical experience as a lawyer at the Legal Clinic for Persons Facing Personal Status Issues at Thammasat University. In this role, she advocated for irregular migrants and stateless persons in Thailand, working closely with civil society organizations. Puangrat obtained an LL.M in Immigration Law (with Merit) from Queen Mary University of London and is currently pursuing a PhD at the same university in the UK. Her doctoral thesis explores the citizenship of emigrants through the lens of their countries of nationality during pandemics.