The VA OIG seeks a sole-source follow-on order to Deloitte Consulting LLP for continued Enterprise Architecture Modernization support under a GSA Schedule contract. VA OIG has been baselining its IT and Business Architecture since October 2025, and the follow-on must proceed without interruption to preserve that baseline and modernization momentum. The effort is integrated with VA OIG’s IT governance, investment planning, cybersecurity posture assessments, and business process optimization, relying on the incumbent’s proprietary or uniquely tailored frameworks, tools, templates, and models. Deloitte is located at 1919 N. Lynn Street, Arlington, VA 22209-1742. Disruption would halt critical architectural artifacts, delay dependent IT initiatives, and impair enterprise-level investment decisions.