Zachry Group is seeking a Senior Technical Project Manager to lead a large-scale Source-to-Pay (S2P) technology initiative spanning procurement, sourcing, contracts, supplier management, invoicing, and payment processes. This role is responsible for end-to-end delivery of an enterprise supply chain platform, including integration with ERP, finance, and related enterprise systems. The Senior Technical Project Manager will partner closely with Supply Chain, IT, Finance, Legal, and service providers. The role requires proven experience managing complex, multi-vendor projects, executive-level communication, financial governance, and disciplined change control.