Employee contextual performance is a crucial determinant of organizational effectiveness, growth, and performance. Therefore, this research focuses on employees' contextual performance issues seen from the perspective of boundary-spanning leaders (BSL), creativity, and proactive work behavior (PWB). The aim is to reveal the effect of BSL, creativity, and PWB on employees' contextual performance and find new models of the role of creativity and PWB in mediating the effect of BSL on employees' contextual performance. The research involved 420 employees from companies in the finance, trade, services, and investment industry sectors in Indonesia. A Likert scale questionnaire designed in Google Forms was used to conduct a survey via the WhatsApp application. Data analysis using structural equation modelling (SEM) shows that BSL, creativity, and PWB significantly direct affect employees' contextual performance; BSL and creativity significantly direct affect employees' PWB; and BSL significantly indirectly affect employees' contextual performance mediated by creativity and PWB. Accordingly, this study proves a new empirical model regarding the effect of BSL on employee contextual performance mediated by creativity and PWB. Based on these findings, this study suggests that researchers and practitioners utilize the empirical model from this study as a strategy to improve employee contextual performance through BSL with a mediation mechanism of creativity and PWB in the future.