Client Finance Manager, Media

Walton Isaacson, LLC’s ("WI")
Client Finance Manager, Media sits within Client Finance and is the bridge between Media and Client Finance. The role owns the financial lifecycle of every media buy, from authorization and actualization through client billing, vendor payment, and month-end close, and is accountable for the controls that keep it accurate, on time, and aligned with client agreements. This is a client-facing leadership role.

The Client Finance Manager, Media partners directly with clients and their finance teams on billing, reconciliation, and reporting; works daily alongside Media, Account Management, and external partners; and is expected to anticipate issues, solve them at the source, and continuously improve how the process runs.

• Department
  : 9020 - Finance & Accounting
• Location
  :
  Culver City, CA
  - Hybrid (candidates must be able to work on-site Tuesday
  - Thursday [or additional days per the needs of the business] during designated work hours.)
• Reports To
  :
  Sr. Vice President, Client Finance
• Direct Reports
  :
  Yes
• Job Level
  :
  Manager
• FSLA Status
  :
  Salary, Exempt
• Employment Type
  :
  Regular Full-Time

• Serve as the primary bridge between Media and Client Finance, translating media plans, buys, and actualized spend into accurate client billing, forecasts, and financial reporting.
• Manage Media and Client Finance working cadence, resolving open items, budget revisions, and discrepancies before they affect client billing or vendor payment
• Act as a client-facing finance partner, presenting billing, reconciliation, and variance information clearly to client marketing, procurement, and finance stakeholders.
• Lead client conversations on billing questions, credits, and disputes, and resolve them in partnership with Account Management.
• Validate all client-facing financial figures before they are shared
• Translate client contract and billing requirements (MSAs, IO terms, billing deadlines) into WI's billing process and controls.
• Manage timely and accurate client billing submissions in accordance with client requirements and contractual deadlines.
• Manage end-to-end vendor invoice reconciliation within Prisma/Mediaocean (or equivalent), ensuring timely approval, accurate coding, and proper transfer into Maconomy.
• Manage intercompany billing and ensure invoices and revenue recognition align with monthly financial close.
• Reconcile client reporting submissions to billing and resolve discrepancies ahead of client billing deadlines to protect revenue timing and cash flow.
• Act as the initial escalation point for reconciliation or billing delays that affect client relationships, revenue timing, or working capital.
• Maintain the Media Billing, Vendor Payment & Financial Controls Playbook and its operating tools: month-end calendar, billing checklist, reconciliation templates, variance tracker, and exception log.
• Coordinate updates to client reporting to ensure all client reporting reflects actualized spending.
• Collaborate with Media and Account Management to review budget-to-actual reports, identify discrepancies, and confirm reconciled media spend.
• Actively manage invoice and billing aging (30/60/90+ days), including spend held before invoicing, and own the exception log through resolution.
• Run the media month-end close: unbilled media, accrued vendor costs, open commitments, and forecast-to-actual variance, with reconciliations evidenced and reviewed.
• Integrate actualized spend and revised estimates into the forecast monthly, with clear timing, ownership, approvals, and change tracking.
• Prepare/review monthly reconciliations of planned versus actual spend.
• Provide variance analysis and cash flow summaries to leadership monthly.
• Develop and maintain dashboards and reporting tools to track…