Serve as the technical leader and architecture decision owner for large, multi-year, and multi-domain initiatives, aligning business stakeholders, architects, engineers, vendors, and operational teams around a coherent design, measurable business outcomes, and clear architecture success criteria. Evaluate enterprise technologies, platforms, vendor solutions, sourcing approaches, and modernization options for strategic fit, interoperability, total cost of ownership, risk, supportability, vendor viability, and long-term business value.