This study empirically examines how employee compassion relates to job performance. Specifically, this study is a constructive replication and expansion of a previous study on the relationship between compassion and job performance using multiple sources of measurement. It investigates unexplored pathways within the public art sector in South Korea. Focusing on the mediating roles of positive work-related identity (PWRI) and positive psychological capital, we collected data from public art institutions in Korea, including galleries and museums, using a survey method. We tested the hypotheses using structural equation modeling and the PROCESS bootstrapping method. Our findings demonstrate a positive association between compassion and job performance, serially mediated by PWRI and positive psychological capital. Theoretically, by constructively replicating and expanding the previous findings, our study contributes to a robust understanding of how compassion could enhance employee performance. Practically, this study reinforces the value of fostering compassion and positive psychological resources to improve job performance, particularly within the public art sector.