Accounts Payable Manager

Quantum-Si • San Diego, CA

6d • Onsite

About The Position

The Accounts Payable Manager is responsible for leading and executing all aspects of the Company's Accounts Payable function, including vendor onboarding, invoice processing, payment execution, employee expense reimbursements, month-end close support, and internal controls. This is a hands-on role requiring both leadership and day-to-day execution. The successful candidate will be comfortable processing transactions, resolving exceptions, managing vendor relationships, and completing operational activities while simultaneously identifying opportunities to improve processes, enhance controls, and leverage automation.

Requirements

• 7+ years of progressive accounts payable or procure-to-pay experience.
• Strong understanding of accounts payable operations, internal controls, and financial close processes.
• Experience working directly within ERP and AP automation systems, NetSuite preferred.
• Experience with Tipalti or other AP automation platforms preferred.
• Ability to perform work in a fast-paced, deadline-driven work environment while consistently meeting standards for productivity and quality.
• Demonstrated ability to balance strategic process improvement with hands-on transactional responsibilities.
• Must be a self-starter with excellent time management skills with proven ability to meet deadlines.
• Communicates in clear and concise manner across multiple levels of the organization, both orally and written.
• Candidates must be authorized to work in the United States.
• Quantum-Si does not provide employment-based immigration sponsorship of any kind for this position, including support for applicants currently pursuing permanent residency (Green Card sponsorship).

Responsibilities

• Own and execute the day-to-day accounts payable function, ensuring accurate and timely processing of invoices, employee reimbursements, credit memos, and vendor payments.
• Perform and review invoice coding, three-way match validation, exception resolution, and approval workflow management.
• Prepare and process payment runs including ACH, wire transfers, virtual card payments, and checks.
• Review, audit, and process employee expense reports for accuracy, completeness, appropriate business purpose, proper supporting documentation, and policy compliance.
• Partner with Procurement, Accounting, Treasury, Tax and department leaders to improve process efficiency and user experience.
• Execute and maintain key controls within the procure-to-pay cycle in accordance with SOX requirements and company policies.
• Ensure invoices, vendor records, and payments are processed in compliance with approval authority requirements and established controls.
• Manage vendor onboarding and maintenance processes, including validation of banking information, tax forms, and required documentation.
• Support monthly, quarterly, and annual close activities related to accounts payable and accrued liabilities.
• Prepare and analyze AP-related reconciliations, schedules, and reports.
• Coordinate annual Form 1099 reporting activities.
• Support compliance with applicable tax, payment, and regulatory requirements.
• Identify opportunities to leverage technology to reduce manual processing and improve scalability.

Benefits

• Comprehensive medical, dental, and vision insurance coverage
• Health Savings Account (HSA) and Flexible Spending Account (FSA) options, where applicable
• Company-paid life and accidental death & dismemberment (AD&D) insurance
• Short-term and long-term disability coverage
• Employee Assistance Program (EAP) resources to support personal and professional well-being
• Discretionary paid time off and company-paid holidays
• Parental leave to support employees welcoming and caring for a new child
• 401(k) retirement savings plan with both pre-tax and Roth contribution options

What This Job Offers

• Job Type: Full-time
• Career Level: Manager
• Education Level: No Education Listed