Mark Henrickson (he/him) is Professor of Social Work at Massey University, Auckland, Aotearoa New Zealand where he has been since 2003. He worked for many years in HIV-related health and mental health care. He has published extensively on gender and sexually diversity and led a national study on HIV and Black African new settlers in New Zealand. He has undertaken consultancies throughout the Asia-Pacific region. His current research explores the ethics of intimacy and sexuality in residential aged care. Major recent publications include the edited book Getting to Zero: Global Social Work Responds to HIV (2017, available free to download on the UNAIDS website); the co-authored book Vulnerability and Marginality in Human Services (with Christa Fouché; Routledge, 2017); The Origins of Social Care and Social Work: Creating a Global Future (Policy Press, 2022); and the edited book HIV Sex and Sexuality in Later Life (Policy Press, 2022).