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Keystone is a premier economics, technology, and strategy consulting firm built to help companies lead through transformation. As breakthrough innovations reshape industries, redefine competition and change our society, complex and highly competitive ecosystems emerge. Keystone advises technology leaders, Fortune 100 companies, their legal counsel, and governments on business, economic, litigation, and regulatory strategy in relation to these innovations and competitive eco-systems. We operate globally from offices in New York City, Boston, San Francisco, Seattle, London, Dubai, and Washington, D.C. We are growing quickly and looking for an exceptional Accounts Payable Manager  to join our Finance team. This is an exciting opportunity for a hands-on AP leader to build and scale a centralized accounts payable and expense management function, strengthen internal controls, and drive automation as Keystone continues its global growth.   About the Accounts Payable Manager Role   The Accounts Payable Manager will lead Keystone’s centralized AP function from our Boston headquarters, owning end-to-end AP operations, expense management, purchase order controls, vendor management, and AP policy governance across domestic and international entities.   This is a builder role for someone who enjoys designing scalable processes, implementing technology, and partnering with stakeholders to improve how the business manages spend. The role reports to the Director of Accounting Operations and Transformation, has one direct report, and is based in Boston, MA on a hybrid schedule with three days per week in the office. This is a hybrid role with a minimum in office requirement of 3 days per week. Key Responsibilities   AP Operations and Controls   Own end-to-end accounts payable operations for a centralized U.S.-based function supporting domestic and international entities. Design, implement, and continuously improve AP workflows that support scalability, accuracy, and strong financial controls. Establish and maintain standard operating procedures across AP processes, including clear performance metrics and regular reporting for Finance leadership.   Proactively identify control gaps, recommend improvements, and help the business adopt consistent AP practices.     Technology, Automation, and Expense Management   Own the AP technology stack, including day-to-day administration of Ramp for corporate card activity, employee expenses, and vendor invoices. Identify and execute automation opportunities across invoice processing, approvals, and payments to reduce manual work and improve cycle times.   Maintain a roadmap of AP process and system enhancements as the function scales.   Own Keystone’s corporate expense policy, including updates, communication, employee guidance, and exception escalation. Oversee the review and audit of employee expense submissions to ensure policy compliance.   Purchase Orders, Vendors, and Stakeholders   Implement and manage a formal purchase order program, including policy design, approval hierarchies, system configuration, and employee training. Establishand enforce three-way match controls across applicable spend categories.   Manage vendor onboarding, statement reconciliation, dispute resolution, payment terms, and ongoing vendor relationships. Partner with Procurement, Legal, FP&A, Operations, and business leaders to align AP processes with broader financial governance objectives. Serve as a trusted advisor to budget owners on AP processes, expense policies, and spend controls. International AP and Compliance    Manage AP obligations across multiple international jurisdictions, including vendor onboarding, statutory payment requirements, VAT/GST considerations, an