Role Summary
Iron Mountain is seeking an experienced and highly motivated Billing Senior Analyst to join our team. In this role, you will be responsible for complex billing operations, and month-end closing procedures. This role oversees specialized billing workflows, ensures rigorous audit compliance, and provides coaching to junior team members. The Senior Analyst collaborates with cross-functional teams to resolve unbilled items, validate contract master data, and ensure seamless revenue recognition across all account tiers in France

What You'll Bring (Skills & Qualifications):

• Diploma of Higher Education minimum

• French: C1 / C2 Level (Fluent / Native written and spoken)

• English: B2 Level (Professional working proficiency)

• 4+ years of progressive experience in a Collections, Billing, Accounting, or Disputes department

• Good knowledge of Office Pack (Excel), Google Workspace (G-Suite)

• Good knowledge of Salesforce (SFDC) and Billing ERPs (Oracle)

• Basic to intermediate Accounting skills (billing, reconciliation)

• Fluency in the client internet portal

• Strong attention to detail, rigorous, and methodical problem-solving approach

• Ability to prioritize workload effectively under SLA deadlines

• Strong interpersonal and relational communication skills

What You'll Do (Responsibilities):

• Routine Invoicing: Perform specialized end-to-end billing workflows and monthly billing tasks across Iron Mountain ERP platforms.

• Month-End Closing: Execute month-end close invoicing tasks, ensuring unbilled balances and deferred revenues are properly accounted for within deadlines

• Data & Completeness Verification: Validate system inputs, perform quality checks on the month-end EDP closing file to ensure completeness prior to invoice generation.

• Unbilled Revenue Management: Monitor and analyse unbilled revenue (On-Hold Accrual), driving initiatives to reduce the accrued amounts.

• Invoice Dispatch: Distribute digital and paper invoices via customer portals, EDI, email, or physical mail within established schedules.

• Audit Compliance: Oversee compliance with internal controls, manage audit requests from internal/external auditors, and ensure adherence to French statutory billing requirements.

• Cross-Functional Alignment: Partner with operational, disputes, commercial / care, collection teams to ensure manual invoicing correctness, to resolve unbilled inventory portal upload failures, and missing purchase orders.

• System & Process Optimization: Identify recurring billing system glitches or process bottlenecks and propose actionable remediation plans. Lead testing for implementations for ERP upgrades, billing system enhancements, and automated customer portal integrations.

• Team Mentorship: Provide functional guidance, quality assurance reviews, and training to BS1 Associates and BS2 Analysts

What We Offer (Benefits):

• Hybrid role located in Cluj, Romania.

• Competitive compensation and benefits aligned with the experience.

• Opportunities for continuous learning and professional growth.

Call to Action:
If you are a motivated, customer-focused individual ready to deliver world-class service, apply today to join the Iron Mountain team!

For over 70 years, Iron Mountain Incorporated (NYSE: IRM) has been your strategic partner to care for your information and assets. A global leader in storage and information management services and trusted by more than 225,000 organizations around the world, including 95% of the Fortune 1000, we protect, unlock, and extend the value of your work—whatever it is, wherever it is, however it’s stored.

We create the framework necessary to bridge the gaps between paper, digital, media, and physical data and extract value along its lifecycle, helping to build your organizational resilience. And all this with a commitment to sustainability at our core.

Our relationship is a true partnership where you trust us not only to preserve institutional knowledge and enhance efficiency, security, and access but to make your work mean more. Because in that work is the power to not only accelerate your business, but elevate it.