Hien is a development economist. She has been engaged in various projects in Africa and Asia for UN agencies (FAO, UNHCR, UN Women - UNEP, UNDP, IFAD, UNCDF). Her expertise focuses on agricultural economics, food security, climate change, financial inclusion, and gender inequality. She has also been involved in other teachings, social and advocacy activities. She obtained a Ph.D. in Economics and Management from Trento University.