The purpose of the "Implementation Support Practitioner Profile" is to identify the skills and competencies needed by implementation support practitioners to support effective implementation and scaling of evidence-informed practices, programs and policies to improve outcomes for people and communities. The integration of implementation research and practice often relies on a specific set of actors who use evidence derived from implementation research to support leaders, practitioners, and community partners in change efforts. We refer to these actors as implementation support practitioners. They often reside outside the service systems they work in but may also reside within a service system when those systems have work units specifically designed to support implementation and scaling efforts. The "Implementation Support Practitioner Profile" outlines the skills and competencies needed to build the capacity of practitioners and communities to effectively use evidence to improve outcomes. The role of the implementation support practitioner is informed by philosophical principles that guide the work and defined by core competencies that describe a range of activities implementation support practitioners conduct. Skills and competencies were identified through a literature review, document review, vetting with individuals providing implementation support, and a content validation survey with international intermediary organizations. A systematic scoping review is underway and focus groups and usability testing will be conducted with implementation support practitioners working in a range of contexts. [This profile was prepared with the Centre for Effective Services.]