Although the White Paper on Families (2013) stipulates that family resilience should be strengthened in family preservation services, no guidelines exist for social workers in the South African context to do so. A need for practice guidelines for social workers in rendering services to families to strengthen family resilience was identified. The following central research question was formulated: How and by doing what, can social workers foster and sustain family resilience? The Intervention Design and Development (IDD) model of Rothman and Thomas (1994) was adapted for the study which included qualitative research to explore and describe the understanding, experiences and suggestions of social workers on family resilience for informing the family resilience intervention guidelines. Data was collected through focus- group and face-to-face semi-structured interviews with social workers employed by the Department of Social Development, and the NGOs from Gauteng, North West and Limpopo province. Tesch’s steps (cited in Creswell 2009:186) were used to analyse the data systematically and data was verified by Guba’s model (cited in Krefting 1991:214–222). Implementing steps 1–5 of phase 1, steps 1–3 of phase 2, step 2 of phase 3 and steps 1–3 of phase 4 of the IDD model, “Practice Guidelines for Social Workers to foster and sustain Family Resilience” (“The Guidelines”) were developed by translating the family resilience theory into practice to guide social workers to be able to develop and implement a family resilience intervention. The content of “The Guidelines” include an introduction containing the social work service delivery principles, the theoretical approaches of service delivery to families and the legislative and policy framework for services to families that would underpin a family resilience intervention. Section 1 of “The Guidelines” was developed and structured around the understanding of the family resilience construct and the family resilience process model on how family resilience operates. Section 2 of “The Guidelines” is presented in a question and answer format. This section provides practical guidelines on how to identify the target group for family resilience interventions, the reciprocal relationship between individual resilience and family resilience, family resilience interventions following the social work intervention process (i.e. intake, developmental assessment, a family developmental plan, and intervention strategies in accordance with the basket of services for families and monitoring and evaluation), how to integrate the domains of family resilience into the family resilience intervention, the need for education of both the social worker and client family on family resilience, the multi-dimensional aspects of the family requiring a multi-disciplinary approach and the role that the safety of family members play when rendering a family resilience intervention. / Social Work / D. Phil. (Social Work)