RONONA E. THOMAS
Taylor,MI
Summary
Highly skilled and results-driven finance professional with exceptional time management and organizational skills and an extensive background in client billing, invoice reconciliation, and Accounts Payables. Goal-oriented individual with excellent written, verbal, and interpersonal communication skills with the ability to prioritize and work with others to accomplish the objectives of the organization.
Analytical professional and critical thinking skills to thrive in data-driven environments. Tackles challenges with positivity and drive to overcome. Works great alone or with others and consistently exceeds expectations.
Overview
14
14
years of professional experience
Work History
Marketing Invoice & Operations Specialist
OtterBase
Ann Arbor, Michigan
11.2024 - Current
- Monitor and analyzed performance metrics to identify areas for improvement.
- Oversee quality control to identify inconsistencies and malfunctions.
- Create Purchase Orders
- Receive invoices against purchase orders for payment approval
Billing Manager
Dentsu International
11.2023 - 03.2024
- Responsibilities included managing Client Finance team – provide weekly status reviews with billers, client approvals, and resolved and escalated discrepancies
- Reviewed and signed media authorizations
- Client and vendor set-up
- Ran aging reports for upper management and vendors
- Provided audit support by providing requested back-up files and answer auditor inquiries
Media Billing Specialist
Media Staffing (Contract at Camelot Strategic Marketing & Media)
06.2023 - 09.2023
- Responsibilities included processed incoming vendor invoices for Spot and Digital media in MediaOcean OX
- Manually entered Digital invoices in MediaOcean Prisma
- Processed vendor credits
- Provide aging reports to Market Specialist team
Client Finance Analyst, Consultant
Gorilla, LLC.
06.2022 - 06.2023
- Responsibilities included, create monthly billing for non-automotive client
- Worked with the Media team to research and resolve client billing discrepancies
- Logged vendor invoices on Excel tracker to request monthly billing
- Entered vendor invoices in MediaOcean to be cleared for payment
- Collaborated with vendor/client/Media teams on process improvements
- Provided reporting to management on monthly spend balances
Client Accounting Specialist
Jack Morton Worldwide
06.2021 - 05.2022
- Responsibilities included, create billing for automotive clients in SAP
- Researched and resolved client billing discrepancies
- Assisted Production Services with logging vendor invoices for payment, using two-way match for accuracy against the purchase order and invoice
- Audited employee expense reports for Travel & Expense compliancy, in Fiori
- Created new job numbers
- Processed month-end job closings
AP Accounting Assistant
KLA Laboratories
11.2020 - 05.2021
- Responsibilities included processing vendor invoices for payment using3-way match
- Processed check and EFT requests
- Entered financial transactions into Great Plains
- Reconciled invoices and identified discrepancies
- Entered bank transactions
- Verified vendor accounts by reconciling statements
Accounting Assistant
iVantage Group (Contract - AAA Life Insurance Co.) - Insurance
05.2019 - 11.2019
- Responsibilities included processed/matched20-25 invoices by performing a two-way match against the purchase order and the invoice, per day
- Processed check requests, approved ACH payments, maintained vendor file for accuracy, and general accounting office duties
- Created a paperless process for the outgoing check matching, using Excel, which saved the company30% daily time for each associate and saved money on wasted paper by50% for the team
Accounts Payable Supervisor
Dentsu Aegis Network – Advertising/Media
11.2016 - 01.2019
- Responsibilities included overseeing the day-to-day operations of my assigned team of five, as well as the overall processes and workflows within our fast-paced environment, for Print media for multiple clients (automotive and non-automotive)
- The team processed approximately150-200 invoices daily
- Communicated with the various shared services teams and stakeholders, both internal and external, to resolve invoice issues, provided/requested information, and maintained/built positive relationships
- Supported the Associate Directors with required reporting, process improvements, creating efficiencies, and analyzing KPIs
- Performed employee performance reviews, timekeeping, and assign and manage accounts payable associates’ workloads
- Ran and distributed monthly aging reports to internal management and account teams; as well as, sent reports to vendors biweekly
- Created pivot tables in Excel reports sorting data by client and vendor
- Processed30-50 invoices by performing a three-way match for accuracy against the insertion order, system insertion, and invoice
- Reconciled account statements in Excel reporting using the VLOOKUP function
Client Biller / Accounts Payable Lead
Amnet Programmatic (Subsidiary of Dentsu Aegis Network)
02.2014 - 11.2016
- Responsibilities included creating billing for multiple clients (automotive and non-automotive)
- Researched and resolved client billing discrepancies
- Assisted with processing vendor invoices for payment, using a three-way match for accuracy against the insertion order, system insertion, and invoice
- Collaborated with vendors and account teams to resolve billing and AP invoice discrepancies
- Collaborated with vendors and accounts teams to create efficiencies to reduce AP open payables to >60 days net
Senior Associate-Digital
Universal McCann – Advertising/Media
07.2010 - 02.2014
- Responsibilities included reconciling and approving50-75 invoices (for automotive clients) per day, by performing a three-way match for accuracy against the insertion order, system insertion, and invoice for Tier2, Digital business
- Running, sorting, and distributing discrepancy reports to internal teams and vendors, for the digital teams
- Worked with vendors and accounts receivable/payable departments regarding insertion statuses and/or missing or discrepant invoices
- Managed all adserving invoices, received, sorted, distributed, reconciled, and approved
- Also, entered media buys into DDS and Media Brands (MBOX) to support the planning/account teams
Education
Bachelor of Science - Business Administration, Finance
Eastern Michigan University
08-2026
Skills
- AS400
- Compliance knowledge
- Dart for Advertisers (DFA)
- Donovan Data Systems
- MediaOcean (OX)
- SAP
- Fiori
- MediaOcean (Prisma & Ignitia)
- MS Excel – Vlookups/Pivot Tables
- MS PowerPoint
- MS Word
- Great Plains
- Dynamics SL
- Quantitative skills
- Experience in leadership
- Cross-functional communication
- Process planning
- Improvement plans
Timeline
Marketing Invoice & Operations Specialist
OtterBase
11.2024 - Current
Billing Manager
Dentsu International
11.2023 - 03.2024
Media Billing Specialist
Media Staffing (Contract at Camelot Strategic Marketing & Media)
06.2023 - 09.2023
Client Finance Analyst, Consultant
Gorilla, LLC.
06.2022 - 06.2023
Client Accounting Specialist
Jack Morton Worldwide
06.2021 - 05.2022
AP Accounting Assistant
KLA Laboratories
11.2020 - 05.2021
Accounting Assistant
iVantage Group (Contract - AAA Life Insurance Co.) - Insurance
05.2019 - 11.2019
Accounts Payable Supervisor
Dentsu Aegis Network – Advertising/Media
11.2016 - 01.2019
Client Biller / Accounts Payable Lead
Amnet Programmatic (Subsidiary of Dentsu Aegis Network)
02.2014 - 11.2016
Senior Associate-Digital
Universal McCann – Advertising/Media
07.2010 - 02.2014
Bachelor of Science - Business Administration, Finance
Eastern Michigan University
Similar Profiles
David SaengthavysoukDavid Saengthavysouk
Helen Concierge at OtterBaseHelen Concierge at OtterBase
DARRELL L. ROSALESDARRELL L. ROSALES
Custodian at Somer Building Maintenance (DTW)Custodian at Somer Building Maintenance (DTW)
Cody MichaelCody Michael
DPW Laborer at Canton TownshipDPW Laborer at Canton Township
Erin WagamanErin Wagaman
Probation Officer at 23rd District CourtProbation Officer at 23rd District Court
Angela Carol FernandezAngela Carol Fernandez
ABA Behavior Tech. at Centra Healthcare Autism ServicesABA Behavior Tech. at Centra Healthcare Autism Services