This study focuses on developing a facilitative model of building and sustaining a community of practice (CoP) as well as the preservation of its domain knowledge within a complex system of systems. It examines complex organizations where problems are realized and solutions develop. As the life span of a project extends beyond that of the experts developing it, the traceability of the original systems concepts deteriorates. The approach is to capture the ontology dictionary through interviews with subject matter experts (SME) and literature reviews. This integrated information is analyzed through a graphical connectivity and centrality analysis. In conclusion, the emergent facilitative model can guide solicitation of tacit legacy knowledge and problem identification.