Recent cultural and arts projects are undergoing rapid transformation driven by the convergence of AI and digital technologies, the rise of participatory content, and increasing demand for social value. These shifts call for a redefinition of the identity and role of arts project implementers, highlighting the need for renewed attention to the public and practical nature of the arts. This study views implementers not as mere administrative staff but as practical leaders who perform multiple, complex roles. Using the OECD DeSeCo framework of Transformative Competency and a qualitative case analysis of the U.S. National Endowment for the Arts Creative Placemaking program, the study examines the competency structure required of implementers. Findings suggest that implementers function as transferable multi-role practitioners-artists, planners, educators, mediators, and researchers and require integrative competencies such as emotional intelligence, aesthetic judgment, cultural sensitivity, creative planning, and collaboration skills. These are not fixed skill sets but cross-dimensional capacities that link internal and external domains. The study proposes that implementers, as key agents of creative practice, must strategically strengthen these competencies to lead change and contribute to social value in the evolving arts ecosystem.