Hsien is completed a D.Phil at Oxford in Medicine. Hsien's research focused on preventative therapies for conditions such as asthma, eczema, dermatitis and hay fever. Hsien is a Consultant Dermatologist at Sydney Skin. He is also a Staff Specialist at Royal Prince Alfred Hospital, consults at the Melanoma Institute Australia, The Skin Hospital and also runs a rural clinic in Ballina. He is a Post Doctoral Research Fellow in the Department of Immune Imaging at the Centenary Institute and The University of Sydney where he focuses on the role of immune cell subsets in the pathogenesis of inflammatory skin disorders and in tumour immunosurveillance.