This article establishes the data platform as the execution engine of Enterprise Data & AI Strategy in Financial Services. It bridges executive strategy and technical delivery by showing how layered architecture (Bronze, Silver, Gold, Platinum), embedded governance, dual promotion lifecycles (North/South and East/West), and domain-aligned operating models turn strategic pillars, architecture & quality, governance, security & privacy, process & tools, and people & culture, into repeatable, regulator-ready outcomes. The result is a platform that delivers control, velocity, semantic alignment, and safe AI enablement at scale.