Previous research has emphasised the dynamic nature of coaching practice and the need to consider both individual performer needs and necessary contextual trade-offs in providing optimum solutions. In this regard, a Professional Judgment and Decision Making framework has been suggested to facilitate an optimum blend of actions against these complex and dynamic demands. Accordingly, we extend this work and address recent calls for greater focus on expertise-oriented assessments, by postulating on the aspirant/developing coach’s capacity for and development of metacognition (i.e., active control over cognitive processes) as a ‘tool’ within the reflective process. Specifically, we propose that metacognition enables essential active cognitive processing for deep learning and impactful application, together with construction and refinement of useable knowledge to inform coaching decisions. Metacognition, therefore, helps to contextualise knowledge provided in training, further optimising the experience, particularly before certification. Finally, we exemplify how metacognition can be developed in coaches through the use of cognitive apprenticeships and decision training tools; and evaluated via a series of observed coaching episodes, with reasoning articulated through pre and postsession interview. Despite challenging traditional competency-based approaches to coach education, we believe that a considered mixed approach represents a vital next step in further professionalising sports coaching.