Revonda Gail Sullivan
Houston,TX
Summary
Senior Accounts Payable leader with 10+ years of progressive experience overseeing high-volume, shared services operations across oil & gas, manufacturing, distribution and healthcare industries. Proven success in GRNI reduction, process optimization, system conversions and people leadership. Recognized for building accountable teams, strengthening control, improving cross-functional collaboration, and delivering measurable operational improvements.
Overview
12
12
years of professional experience
1
1
Certification
Work History
Accounts Payable Supervisor / Team Lead
- Led AP teams of up to 8 staff, supporting Oracle and SAP systems.
- Oversaw invoice processing, payment runs, Month-End close and audits.
- Supported EFT setup, vendor compliance, IRS B-notices, and 1099 reporting.
- Maintained SOX compliance through accurate invoice processing and documentation.
Accounts Payable Supervisor, Shared Services
National Oilwell Varco (NOV)
11.2019 - Current
- Lead daily operations for a team of 6 AP professional supporting shared services.
- Drive reduction of GRNI by 85% of aged items greater than 120 days, reporting trending analysis, along with balance sheet reconciliation.
- Reduced invoice processing cycle time by 80% (from 15 days to 3 days) by streamlining workflow and improving cross-functional coordination, resulting in stronger supplier relationships, improved internal customer satisfaction, and increased on-time payment performance; enhancing cash flow by reducing payment delays and penalties, while capturing early payment discounts.
- Maintained SOX compliant internal control for invoice processing, invoice approval, payment processing and vendor setups.
- Converted supplier payment methods from checks to EFT, increasing electronic payments from 25% to 92%, improving payment efficiency and reducing processing costs.
- Successfully supported the conversion of 9 financial ledgers by validating open payables report and supplier master records, preventing payment disruption and post-conversion discrepancies.
- Develop and maintain SOPs and KPIs to improve efficiency, accuracy and accountability.
- Oversee Month-End close activities including accruals, open payables, and discrepancy reporting.
- Reconcile bank statements, ECH/EFT returns, outstanding checks, wires and intercompany settlements.
- Partner cross-functionally with General Ledger and Procurement on reconciliation and invoice issue resolution.
- Prepare and submit annual 1099 filings and support Unclaimed property compliance.
- Hire, train, coach and conduct performance reviews to strength team capability and engagement.
Accounts Payable Team Lead, Shared Services
Sysco Corporation
10.2016 - 10.2019
- Managed daily workload for 14 AP team members supporting 73 Operating Companies.
- Ensure SLA compliance and tracked month performance metrics.
- Played a key role in the onboarding of 58 OpsCos into Shared Services.
- Delivered AP training to operating companies and global partners.
- Oversaw payment disbursement (ACH, check, wire) and resolved exceptions.
- Managed unclaimed property reclassifications and 1099 filing for corporate and OpCos.
Accounts Payable Supervisor, Shared Services
Distribution Now (DNOW)
05.2015 - 10.2016
- Supervised 3 Team Leads and 14 AP Specialists in a high-volume environment.
- Managed invoice processing across SAP ERP, Dolphin workflow, ADP Open Invoice, intercompany and foreign vendors.
- Lead GRNI reduction and reconciliation efforts and vendor credit balance review.
- Oversaw Month-End close, accrual, IR reversals and performance metrics.
Accounts Payable Team Lead, Shared Services
Enterprise Products
09.2013 - 03.2015
- Supervised 9 AP Specialists using Oracle R12 and Peladon systems.
- Managed invoice processing, interface troubleshooting, and vendor statement reconciliation.
- Produced weekly A/P performance reports to leadership.
- Collaborated with Purchasing and Project Managers to resolve discrepancies.
Education
Bachelor of Science - Accounting
Colorado Technical University
03.2020
Associate degree - Accounting
Colorado Technical University
01.2011
Skills
- Operational Excellence
- Process Improvement
- Leadership
- SOP Development
- Team Development
- Performance Management
- Audit Readiness
- Dispute Resolution
- Unclaimed Property
- SAP
- JD Edwards
- Epicor
- AS400
- Meditech
- Peladon
- ImageNow
- Microsoft Excel
- Microsoft PowerPoint
- SOX Compliance (Accounts Payable)
- GRNI Reduction
- ERP Implementation
- Balance Sheet Reconciliation
- KPI Development
- Coaching
- Month-End Close
- Vendor Management
- 1099 Reporting
- Oracle Cloud Omega
- Oracle R12
- Concur
- SyteLine
- Lawson
- Basware
- Readsoft
- Workday
- Microsoft Word
- Accounts Payable Shared Services
- SOX Compliance
- Cash Flow Management
- GRNI/RNI Reduction & Balance Sheet Reconciliation
- Process Improvement & SOP / KPI Development
- ERP & AP System Implementation (SAP, Oracle Cloud, Workday)
- Team Development, Coaching & Performance Management
- Month-End Close & Audit Readiness
- Vendor Management & Dispute Resolution
- 1099 Reporting & Unclaimed Property
Certification
Accredited Payables Specialist (APS), IOFM – Institute of Finance & Management, 2026
WEBSITES, PORTFOLIOS, PROFILES
https://www.linkedin.com/in/revonda-sullivan-aps-6b586865
Timeline
Accounts Payable Supervisor, Shared Services
National Oilwell Varco (NOV)
11.2019 - Current
Accounts Payable Team Lead, Shared Services
Sysco Corporation
10.2016 - 10.2019
Accounts Payable Supervisor, Shared Services
Distribution Now (DNOW)
05.2015 - 10.2016
Accounts Payable Team Lead, Shared Services
Enterprise Products
09.2013 - 03.2015
Accounts Payable Supervisor / Team Lead
Bachelor of Science - Accounting
Colorado Technical University
Associate degree - Accounting
Colorado Technical University