Nick Mackey

Accounts Payable Manager with 14+ years of progressive accounting experience, including 7+ years leading AP operations in high-growth, complex environments across technology, biomedicine, sports, and manufacturing. Proven track record owning end-to-end AP lifecycle management, month-end and year-end close, audit documentation (PBC preparation, external auditor support), and US GAAP compliance across expense recognition, accruals, and prepaid expenses. Hands-on operator with deep expertise in NetSuite and Coupa — building scalable, standardized AP processes from the ground up and driving automation and AI-enabled tools to reduce manual effort and strengthen internal controls.

Skilled cross-functional partner to Corporate Accounting, FP&A, and Procurement, with a strong track record of building efficient workflows, developing AP teams, and delivering audit-ready financials in fast-paced environments.

Senior Accountant - Plunge - Roseville, CA

(2025-12)

• Own end-to-end AP operations within NetSuite and Stampli, including invoice intake, GL coding, approval workflows, payment execution, and vendor communication — ensuring timely and accurate posting to the general ledger.
• Lead month-end close for AP, including accrual entries, prepaid amortization schedules, account reconciliations, implementing controls to support a clean trial balance and reduce post-close adjustments.
• Build and maintain audit-ready AP documentation and SOPs; serve as primary AP subject matter expert for internal controls review and audit support requests.
• Leverage AI-assisted invoice coding in Stampli and implemented default GL coding logic to automate invoice classification, reducing manual effort and improving accuracy and scalability across AP operations.
• Supervise and coach an AP Specialist through daily work review, prioritization, and quality control, while remaining hands-on in transaction processing and process improvement projects.
• Partner with accounting leadership on accrual accuracy, cash forecasting, and vendor issue resolution to support Controller and financial reporting needs.
• Identify process gaps and drive continuous improvement initiatives — revamping departmental SOPs, strengthening internal controls, and improving documentation standards.

Accounts Payable Analyst - CZ BioHub - San Francisco, CA

(2023-11 - 2025-12)

• Managed end-to-end AP operations for two entities representing ~45% of total company billing, ensuring accurate GL posting, proper expense recognition, and compliance with US GAAP accrual and prepaid standards.
• Supported month-end and year-end close, including account reconciliations, accrual journal entries and preparation of audit-ready work papers and PBC schedules for external auditors.
• Partnered on the implementation of Coupa and Workday, improving procure-to-pay workflows, vendor onboarding controls, and invoice approval automation.
• Designed KPI reporting to monitor invoice processing accuracy, payment timeliness, and AP operational efficiency — providing Corporate Accounting and FP&A with actionable financial visibility.
• Revised AP policies and procedures in collaboration with accounting leadership, reducing process redundancies by ~50% and enhancing internal controls documentation.
• Enhanced vendor onboarding procedures with verification and fraud prevention controls, improving vendor data accuracy and documentation standards.

Accounts Payable Manager - Trinchero Family Estates - Napa, CA

(2021-06 - 2023-09)

• Led AP operations for 2,000+ vendors across three subsidiaries, managing a team of 4 FTE, 2 part-time, and 3 shared services staff — building scalable processes in a complex multi-entity environment.
• Owned month-end and year-end close for AP, including reconciliations, accrual accuracy reviews, and cut-off controls; consistently delivered clean, audit-ready financials and supported external audit requests.
• Automated invoice review and posting for select vendors, saving ~20 hours per week in manual processing time and improving scalability of AP workflows across high-volume transaction periods.
• Led UAT and rollout of a Vendor Management Portal, reducing vendor support requests by 40% and improving purchase order accuracy and vendor data integrity.
• Reduced payment processing time by 25% through workflow automation and process redesign; reduced invoice entry exceptions by 40% through improved AP-Procurement collaboration and PO-matching controls.
• Owned 1099 reporting, unclaimed property tracking and reporting, and internal controls documentation in compliance with applicable regulatory requirements.

Accounts Payable Manager - Golden State Warriors - San Francisco, CA

(2014-09 - 2021-01)

Promoted from Accounts Payable Specialist to Accounts Payable Manager based on demonstrated operational ownership, process improvement results, and leadership capability.

• Managed AP operations across 13 subsidiaries in a high-growth, complex environment — supervising 2 FTE and 2 temporary staff while driving AP scalability, audit readiness, and financial controls.
• Led successful implementations of NetSuite, Coupa, and Concur Expense Management; built standardized AP procedures, GL coding frameworks, and PO-based invoice workflows from the ground up.
• Served as primary AP subject matter expert for external audits — preparing PBC schedules, supporting auditor requests, and maintaining audit-ready documentation across multi-entity financials.
• Drove transition from paper check to electronic payment methods (EFT, virtual card, wire), increasing electronic payments to 90% of total volume and generating $700K+ in rebate revenue.
• Reduced manual data entry by 40% through system integrations, workflow automation, and AP process redesign — significantly improving accuracy and scalability.
• Partnered with Corporate Accounting and FP&A on accrual reviews, cash forecasting support, and month-end/year-end close procedures across all entities.
• Owned annual 1099 reporting and unclaimed property processes; developed and maintained AP SOPs and internal controls documentation for ongoing compliance and audit support.

Accounting Analyst - Nissan North America - Franklin, TN

(2011-01 - 2014-09)

• Managed AP invoice workflow through JP Morgan Order-to-Pay system, reducing processing time by 40% through process improvement and workflow optimization.
• Reconciled balance sheet accounts for six affiliate companies and managed annual unclaimed property reporting in compliance with multi-state regulatory requirements.
• Analyzed Ernst & Young audit findings, partnered with internal teams to resolve discrepancies, and improved financial accuracy and internal controls documentation.
• Led project to update the master vendor list ahead of a major ERP implementation, ensuring vendor data accuracy and clean migration of AP records.

Master's Degree - Lipscomb University

Bachelor's Degree - Curry College