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 before coming into the academic sector. He has published on HIV prevention, care delivery, and programme design and evaluation. Mark was the project leader on Lavender Islands: Portrait of the Whole Family (2004), He has published extensively on gender and sexually diverse populations and led the AfricaNZ Health study on Black African new settlers in Aotearoa New Zealand (2012-13). His recent major publications include the edited book Getting to Zero: Global Social Work Responds to HIV (available free to download on the UNAIDS website) released in 2017, and a co-authored book Vulnerability and Marginality in Human Services (with Christa Fouché; Routledge, also in 2017). His current funded research explores the ethics of intimacy and sexuality in residential aged care. Mark is a registered social worker in New Zealand.