• Own end-to-end US payroll processing across multiple states, ensuring accuracy and timeliness for all pay runs. • Support EMEA payroll operations across Switzerland, UK (including Northern Ireland), Republic of Ireland, France, Germany, and Denmark, in partnership with regional vendors and the Payroll Manager. • Administer leave of absence payroll processing, ensuring accurate pay, benefit deductions, and compliance with applicable state and federal regulations. • Act as a subject matter expert and point of contact for employee and internal partner payroll inquiries. • Collect, verify, and maintain compensation, benefit, and deduction data to support payroll calculations and ensure data integrity. • Ensure proper taxation and compliance with federal, state, local, and international payroll regulations across all operating jurisdictions. • Process equity-related payroll items, including stock options and RSUs, and ensure proper tax withholding and reporting compliance. • Perform payroll accounting tasks including journal entries and GL reconciliations, as part of month/quarter/year-end close activities. • Support external audits, including financial statement audits, workers' compensation audits, and 401(k) audits, by preparing schedules, pulling data, and responding to auditor inquiries. • Identify opportunities for process improvement and drive cross-functional initiatives to enhance payroll operations, system efficiency, and compliance. • Leverage AI and automation tools to streamline payroll workflows, reduce manual effort, and improve operational efficiency. • Collaborate with People, Finance, and Legal teams on payroll matters and policy compliance. • Assist with payroll system implementations, upgrades, and related projects as needed. • Support future payroll entity build-outs in APAC and LATAM as the company expands into new regions.