Commanders LLC directed organizational change management for Marriott International's enterprise-wide finance outsourcing initiative, transitioning financial operations to a recognized contract support vendor using a lift-and-shift methodology across 120 properties. Our team developed comprehensive readiness assessments and stakeholder engagement strategies to ensure seamless knowledge transfer while maintaining operational continuity during the transition. Applying Prosci ADKAR principles, we guided finance teams through each phase of change—from initial awareness through sustained adoption—delivering structured communication plans, role-based training programs, and adoption metrics that achieved rapid operational consolidation and measurable cost efficiencies across the global hospitality portfolio.