Part II of the two-part series ‘Governance-by-Design for Private Markets’ advances governance-by-design from a diagnostic framework to an operational model. As long-term investors such as pension funds and sovereign wealth funds become more sophisticated and evolve from product takers into platform architects, governance becomes increasingly important. This article argues that governance-by-design becomes an operational necessity when private markets platforms begin to function less as traditional asset managers and more as core components of global capital infrastructure.