Assistant Manager, Accounts Payable (OPEX & T&E)

About DayOne Data Centers

DayOne Data Centers is a Singapore-headquartered global digital infrastructure platform that develops and operates next-generation data centers across Asia Pacific and Europe. Trusted by leading hyperscalers and businesses, the company engineers, builds, and operates high-capacity, AI-ready campuses with speed, scale, and reliability.

About DayOne Data Centers

DayOne Data Centers Limited ("DayOne") is a Singapore-headquartered global digital infrastructure platform that develops and operates next-generation data centers, with a footprint across markets in Asia Pacific and Europe. Trusted by leading global hyperscalers and businesses, DayOne designs, builds, and operates high-capacity, AI-ready campuses with speed, scale, and reliability.

About the Role

You'll lead Accounts Payable operations covering operating expenditure (OPEX) and employee travel and expense (T&E) claims across DayOne's growing regional business. Based in Kuala Lumpur, you'll oversee the accurate and timely processing of vendor invoices and employee reimbursements while ensuring strong financial controls, policy compliance and operational efficiency.

Reporting to the Senior Manager, Finance & Accounting, you'll manage the OPEX and Staff Claims teams within our Finance Shared Service Centre, working closely with Procurement, HR, Payroll, Finance and regional business stakeholders.

This is a hands-on operational leadership role with a strong focus on process improvement, standardisation and automation. Beyond overseeing daily transactions, you'll help strengthen AP governance, improve the employee reimbursement experience and build scalable processes that support DayOne's continued expansion.

Responsibilities

Lead OPEX Accounts Payable operations

• Oversee end-to-end processing of OPEX vendor invoices, including purchase order (PO) and non-PO invoices, invoice validation, SAP posting and goods receipt/invoice receipt (GR/IR) matching.
• Ensure invoices are processed accurately and within agreed service-level agreements (SLAs), with appropriate accruals and supporting documentation for month-end closing.
• Manage GR/IR clearing, AP subledger reconciliations and outstanding balances, ensuring aged and unmatched items are investigated and resolved promptly.
• Oversee vendor enquiries, statement reconciliations and payment-related discrepancies, maintaining strong controls to minimise duplicate payments and processing errors.

Manage global staff claims and T&E operations

• Lead the end-to-end employee expense claims process across DayOne entities, from claim submission in Workday through validation, approval and posting in SAP.
• Ensure employee reimbursements comply with company T&E policies, including appropriate supporting documentation, cost centre allocation, general ledger (GL) mapping and tax treatment.
• Monitor claims exceptions, recurring compliance issues and reimbursement delays, recommending corrective actions and policy enhancements where necessary.
• Partner with HR, Payroll, Finance and system owners to improve Workday–SAP integration, reduce manual intervention and enhance the efficiency and accuracy of claims processing.

Drive process improvement and financial controls

• Identify operational inefficiencies, bottlenecks and control gaps across OPEX AP and employee claims processes, leading initiatives to simplify, standardise and automate workflows.
• Develop and maintain standard operating procedures (SOPs), work instructions and process documentation to ensure consistent practices across the Shared Service Centre.
• Establish and strengthen SOX-compliant internal controls, including appropriate segregation of duties, approval workflows and audit-ready documentation.
• Define and monitor operational performance indicators, including processing turnaround time, first-time-right accuracy, outstanding backlogs and aged transactions.
• Support the integration and onboarding of new entities into DayOne's Finance Shared Services operating model, ensuring processes remain scalable as the business expands.

Partner with regional stakeholders

• Act as a key point of contact for OPEX AP and employee claims matters, working closely with Procurement, General Ledger, HR, Payroll, budget owners and regional business teams.
• Establish clear communication channels, service expectations and escalation procedures to ensure timely resolution of operational issues.
• Collaborate with Finance and business stakeholders to resolve complex invoice discrepancies, reimbursement exceptions and process-related challenges.
• Support internal and external audits by ensuring accurate financial records, complete supporting documentation and timely responses to audit enquiries.

Lead and develop the AP team

• Lead, coach and develop team members responsible for OPEX invoice processing and employee claims, fostering accountability, accuracy and continuous improvement.
• Oversee workload allocation, operational priorities and backlog management to ensure service levels and processing deadlines are consistently met.
• Set clear performance expectations, monitor individual and team productivity, and provide ongoing guidance and development opportunities.
• Promote collaboration, knowledge sharing and consistent operating practices across the OPEX and Staff Claims teams.

Requirements

• A recognised bachelor's degree in Accounting, Finance or a related discipline.
• At least 6–8 years of relevant Accounts Payable experience, including a minimum of 2 years in a team leadership or supervisory capacity.
• Strong hands-on experience managing end-to-end AP operations, including PO and non-PO invoice processing, GR/IR reconciliation, payment controls and month-end closing.
• Practical experience managing employee travel and expense claims across multiple entities or countries, including claims validation, policy compliance and reimbursement processes.
• Demonstrated experience leading process improvements, standardising workflows or implementing automation initiatives within AP or Finance operations.
• Experience working in a Shared Service Centre, regional Finance hub or multinational organisation with complex, multi-entity operations.
• Good understanding of internal financial controls, segregation of duties and SOX or comparable compliance frameworks.
• Strong SAP experience, with the ability to investigate discrepancies, resolve processing issues and support system-related improvements.
• Strong analytical, problem-solving and stakeholder management skills, with the ability to manage competing priorities and operational deadlines.
• Proven ability to lead, coach and develop team members while maintaining high standards of service delivery.
• Strong communication skills and proficiency in English, both written and spoken.

Nice to Have

• Professional accounting qualification such as ACCA, CPA or an equivalent certification.
• Experience with SAP S/4HANA, including system migrations, enhancements or process optimisation.
• Familiarity with Workday Expenses, SAP Concur or similar employee expense management platforms.
• Experience improving integrations between expense management systems and ERP platforms.
• Knowledge of automation and workflow tools such as Power Automate, PowerApps or Robotic Process Automation (RPA).
• Advanced Microsoft Excel skills and experience developing operational dashboards or KPI reporting.
• Experience supporting the transition or onboarding of new entities into a regional Shared Services environment.

Why DayOne?

You'll play an important role in strengthening the Finance operations that support DayOne's rapid expansion across multiple markets.

You'll have the opportunity to lead regional AP and employee expense processes, improve financial controls and drive meaningful operational improvements through standardisation, automation and system enhancements.

You'll join a fast-growing data center platform where you can develop your leadership capabilities, work with diverse regional stakeholders and help shape scalable Finance processes for a growing international business.

We are an Equal Opportunity Employer

DayOne is an equal opportunity employer committed to building a diverse and inclusive workplace. We welcome applications from all qualified individuals regardless of race, ethnicity, gender, sexual orientation, age, disability, religion, or any other characteristic protected by applicable law. We believe that diverse perspectives strengthen our team and drive better outcomes for the communities we serve worldwide.

DayOne is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

If you're ready to grow with one of the fastest-moving companies in the data center industry, apply now and be part of our global journey.