At Iron Mountain we know that work, when done well, makes a positive impact for our customers, our employees, and our planet. That’s why we need smart, committed people to join us. Whether you’re looking to start your career or make a change, talk to us and see how you can elevate the power of your work at Iron Mountain.

We provide expert, sustainable solutions in records and information management, digital transformation services, data centers, asset lifecycle management, and fine art storage, handling, and logistics. We proudly partner every day with our 225,000 customers around the world to preserve their invaluable artifacts, extract more from their inventory, and protect their data privacy in innovative and socially responsible ways. 

Are you curious about being part of our growth stor​y while evolving your skills in a culture that will welcome your unique contributions? If so, let's start the conversation.

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 Napoca, Romania.
• Competitive compensation and benefits aligned with the experience.
• Opportunities for continuous learning and professional growth.