Ippokratis Efstathiou is a social worker with a PhD in Social Work and serves as Head of Social Services at IASIS NGO, coordinating fieldwork in homelessness, mental health and community-based interventions. He also teaches as adjunct academic staff in the Department of Social Work at the University of West Attica, Greece. His doctoral research examined pathways out of homelessness in Greece and the role of social workers in reintegration processes, drawing on structural approaches to homelessness and critical social work theory. His work has been published in European Social Work Research and he has written book chapters on mental health social work, psychosocial crisis intervention and housing justice. He has taken part in crisis intervention missions in Ukraine, Armenia and Türkiye, as well as in disaster-affected areas of Greece, including Northern Evia, Mati and Thessaly, and has contributed to research on homelessness, mental health, community social work and crisis response. He is Vice-Chair of the European Social Work Research Association (ESWRA) and serves as a peer reviewer for academic journals in the field.