Aim To evaluate an aged care program in developing self‐efficacy of newly graduated registered nurses. Methods An evaluation of the program was conducted using a mixed methods approach. Twenty‐four nurses completed the pre‐ and post‐survey of aged care nursing self efficacy and attended one of three focus groups held to gain in‐depth understanding of their insight into the program. Results There was an increase in nurses' self‐efficacy post‐program. The increased self‐efficacy and new knowledge gained enhanced nurses' confidence and enabled them to critically appraise their workplace practices. Conclusions The improved confidence resulting from increased self‐efficacy and new knowledge gained from the aged care program enabled nurses to critically appraise the practices in their workplace, demonstrating the program's effectiveness. Aged care service providers should support continuing education for aged care nurses to ensure sustainability of a competent workforce to manage the increasing aged care population.