• Lead the design, development, configuration, and implementation of tax technology solutions across SAP (S4 HANA/FI) and Vertex (O Series/Cloud). • Analyze business requirements and translate them into system configuration, functional specifications, and technical designs. • Drive tax-related components of ERP enhancements, system upgrades, and new business integrations (e-commerce, POS, supply chain, global expansion). • Partner with IT developers and architects to deliver scalable solutions, ensuring proper integration between SAP, Vertex, retail systems, and downstream reporting tools. • Develop and execute test strategies, including unit testing, SIT, UAT, and regression testing for tax configurations and enhancements. • Serve as the primary escalation point for tax-related system issues, troubleshooting errors, incorrect tax calculations, data inconsistencies, and integration failures. • Collaborate closely with business stakeholders to understand operational challenges and propose effective, compliant tax solutions. • Conduct root-cause analysis and implement corrective actions to prevent recurring tax issues. • Provide expert guidance on tax implications of new business models, promotional programs, sourcing changes, and system workflows. • Support the tax compliance team by ensuring accurate tax determination, reporting, and audit readiness across multiple countries and sales channels. • Maintain tax master data, jurisdiction codes, rules, and rate updates in SAP and Vertex. • Work with Tax, IT, Digital, Finance, Accounting, Procurement, Supply Chain, E-commerce, and Retail Operations to align system solutions with business needs.