Payroll Administrator, US & Canada Payroll Processing

Payroll Administrator , US & Canada Payroll Processing Department: Finance Location: Headquarters - Toronto Hybrid - 2-3X per week in the Toronto office. Position Overview Blue Moon Metals is seeking an experienced and detail-oriented Payroll Administrator to join our growing team. This role is responsible for supporting the accurate and timely processing of US payroll, with secondary support for Canadian payroll, while applying strong knowledge of payroll rules, regulatory requirements, reconciliations, tax reporting, workers compensation, and payroll-related compliance obligations. The Payroll Administrator will work closely with Human Resources, Finance, employees, external payroll providers, and other internal stakeholders to ensure payroll information is accurate, complete, and processed in accordance with company procedures and applicable federal, state, provincial, and local payroll requirements. This is an ideal opportunity for someone who is highly comfortable with US payroll administration, Paychex, payroll controls, and evolving payroll practices in a growing, multi-jurisdictional organization. Key Responsibilities US Payroll Processing & Administration Coordinate and support regular US payroll processing, ensuring employee information, hours, earnings, deductions, taxable benefits, and other payroll inputs are accurate and submitted on time. Review payroll information for completeness and accuracy prior to processing, including validation of pay rules, overtime treatment, PTO and leave-related items, and full-time or part-time payroll classifications. Reconcile payroll data, deductions, taxes withheld, payroll-related balances, and other payroll outputs, identifying discrepancies and coordinating corrections as required. Support payroll tax reporting and required filings by ensuring data provided through Paychex and other payroll-related systems is accurate, complete, and reviewed in a timely manner. Support workers compensation payroll reporting, reconciliations, audit requirements, and related documentation across applicable US jurisdictions. Execute payroll-related onboarding, offboarding, employee status changes, compensation updates, banking information, and other payroll changes in an accurate and timely manner. Maintain accurate payroll records, documentation, and audit-ready support in accordance with company practices and applicable record-retention requirements. Stay current on payroll requirements across relevant US jurisdictions and proactively research or escalate emerging requirements related to payroll rules, filings, overtime, PTO, and other payroll compliance matters. Payroll Data, Onboarding & Offboarding Maintain payroll-related employee data and ensure payroll changes are accurately reflected between HR, payroll, and related systems. Support payroll setup for new hires, including required payroll documentation, jurisdictional requirements, tax setup, banking…