Global Payroll Lead

ABOUT MERCOR

Mercor's mission is to organize human intelligence to power the AI economy. We're a leading AI data company, building the layer between human expertise and frontier models. Millions of domain experts on the platform are paid over $4 million per day to train frontier AI models. Mercor's APEX benchmark family measures AI's real-world impact on professional work. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents.

Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society. Mercor is a profitable Series C company valued at $10 billion. We work in-person five days a week in our San Francisco, NYC, or London offices.

About the Role

Mercor is seeking a high-execution payroll leader to spearhead global payroll delivery while scaling our underlying operational infrastructure. In this role, you will hold end-to-end accountability for payroll execution schedules, vendor governance, internal controls, general ledger reconciliations, and complex issue resolution, all while driving high-impact automation initiatives. Additionally, you will orchestrate the seamless transition of acquired talent onto Mercor's unified payroll architecture.

Working cross-functionally, you will collaborate closely with Accounting, People Ops, Finance Systems, Legal, and international payroll partners. This position demands a mix of strategic oversight and hands-on execution—diving deep into operational mechanics, driving swift decision-making within structured framework guidelines, and proactively flagging operational bottlenecks to executive leadership.

What You'll Do

- Run employee payroll cycles across assigned countries, coordinating inputs, validations, approvals, funding deadlines, and provider processing so employees are paid accurately and on time.

- Review new hires, departures, compensation changes, bonuses, benefits, deductions, and equity-related payroll inputs with functional owners; investigate exceptions before approval.

- Reconcile payroll outputs to approved inputs, funding, and accounting records. Partner with Accounting on journals, accruals, balance sheet reconciliations, and month-end close.

- Maintain country calendars and evidence of required filings and remittances, working with providers and local advisers to resolve issues and complete year-end activities.

- Lead payroll workstreams for acquisitions and new-country launches, including data mapping, cutover planning, testing, parallel runs where appropriate, and post-launch reconciliation.

- Improve HRIS-to-payroll data flows, approval workflows, and reporting. Deliver scoped implementations and vendor transitions with documented requirements and acceptance criteria.

- Build operating procedures, backup coverage, access controls, and audit evidence, maintaining separate preparation and approval responsibilities for payroll and payments.

- Resolve employee pay questions clearly and promptly. Track accuracy, on-time delivery, reconciliation aging, and issue resolution, and address recurring causes.

- Automate repeatable checks and reporting using approved tools, with validation, human review, and appropriate protection of employee data.

What We're Looking For

- 7+ years of progressive payroll experience in high-growth tech startups

- Hands-on ownership of US payroll and experience delivering payroll in additional countries through local teams or providers.

- Strong understanding of payroll processing, reconciliations, statutory deadlines, controls, and year-end reporting, with judgment about when to involve local tax or legal specialists.

- Experience delive