Returning to work after giving birth has been associated with negative impacts on working mothers’ breastfeeding behaviors and perinatal mental health. In addition, work-family conflict and social support at work (i.e., supervisors, coworkers) influence working mothers’ breastfeeding behaviors and mental health outcomes. Workplace resources (e.g., maternity leave, breastfeeding accommodations) reduce the negative consequences of returning to work, but working mothers often face barriers to accessing these resources. The purpose of this dissertation was to use the Job Demands-Resources Model and ecological framework to refine the conceptualization of return to work and examine women’s experiences with returning to work using the life history interview method. In addition, this dissertation aimed to understand women’s experiences with breastfeeding and perinatal mental health by examining their experiences with work-family conflict, social support, and accessing workplace resources. Two studies were conducted using a sequential, mixed methods design that comprised of an online survey and interviews with a sub-sample of survey respondents. First-time mothers in Georgia who were currently in their first year postpartum and returned to paid work after giving birth were recruited to participate. The first study examined working mothers’ experiences with returning to work, work-family conflict, breastfeeding, and mental health. The second study examined working mothers’ experiences with accessing resources, perceptions of social support, and identified resources needed to support working mothers. Descriptive statistics were used to analyze the survey data. Interview data were analyzed using inductive coding and thematic analysis. Finally, the survey and interview data were integrated in a sequential, quantitative to qualitative analysis. Findings from the first study revealed most participants returned to full-time work schedules in educational settings, the types of work-family conflict participants experienced, and factors that alleviated work-family conflict. Findings from the second study revealed the challenges participants faced when accessing workplace resources (e.g., maternity leave, private spaces for breastfeeding) and how social support from supervisors and coworkers alleviated these challenges. Participants also advocated for increased access to paid maternity leave. Findings from these studies highlight the importance of implementing strategies to connect women to the resources and support they need during their return to work.