Beyond Individual Resilience: A Social–Ecological Perspective on Sustaining the NICU Nursing Workforce

Background/Objectives: Sustaining a stable and competent workforce in neonatal intensive care units (NICUs) is critical for ensuring high-quality care for vulnerable neonates. However, workforce-related challenges such as job dissatisfaction and turnover remain significant concerns in high-acuity settings. Guided by the ecological model, this study aimed to examine resilience, communication competence, and the nursing work environment as multilevel factors associated with nursing workforce sustainability, with job satisfaction serving as a proxy indicator related to workforce retention and sustainability. Methods: A descriptive cross-sectional survey was conducted among 145 NICU nurses from three tertiary and three general hospitals in South Korea. Data were analyzed using descriptive statistics, independent t-tests, one-way ANOVA, Pearson’s correlation coefficients, and multiple regression analyses using SPSS version 29.0. Results: Job satisfaction was positively associated with resilience (r = 0.67, p < 0.001), communication competence (r = 0.52, p < 0.001), and the nursing work environment (r = 0.57, p < 0.001). Multiple regression analysis indicated that resilience (β = 0.43, p < 0.001), nursing work environment (β = 0.30, p < 0.001), communication competence (β = 0.15, p = 0.040), and employment in a tertiary hospital (β = 0.12, p = 0.038) were significant factors associated with job satisfaction, explaining 55.1% of the variance (adjusted R2) in job satisfaction (F = 30.42, p < 0.001). Conclusions: Job satisfaction, used as a proximal indicator related to workforce sustainability, was associated with multilevel factors across intrapersonal, interpersonal, and organizational domains. Although resilience showed the strongest association, communication competence and the nursing work environment also showed meaningful associations with job satisfaction. These findings highlight the need for integrated, multilevel strategies to support nursing workforce sustainability and sustained nursing practice in NICU settings.