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.

Job Summary

Iron Mountain is seeking a meticulous Billing & Dispute Resolution Specialist to join our Customer Excellence team.

In this role, you will be responsible for ensuring prompt revenue collection and maintaining financial integrity by acting as the key problem-solver for billing and payment issues, upholding Iron Mountain’s commitment to security and accuracy.

What You’ll Do (Responsibilities)

In this role, you will:

• Key Responsibilities:

  Billing Execution & Quality Control:

  Review and verify the accuracy of all invoices before issuance to ensure they meet specific customer requirements.

  Manage and monitor timely invoice delivery through various channels, including Email, Customer Portals, and Manual billing, strictly adhering to each client’s billing guidelines and procedures.

  Dispute Resolution & Cross-Functional Collaboration:

  Investigate and resolve invoice discrepancies and customer disputes by collaborating with internal departments.

  Lead and facilitate alignment meetings with Commercial, Customer Service, and Operations teams to identify root causes and implement corrective actions for inaccurate billing.

  Global System & Credit Note Management:

  Work closely with regional/global teams to track and monitor invoices generated via the Salesforce system.

  Prepare, verify, and consolidate all necessary data and supporting documentation required for the CN/DNissuance process.

  Billing Master Data & Customer Profile Management :

  Manage, update, and maintain accurate billing master data and customer profiles within the Salesforce system.

  Ensure all client-specific billing rules, special rates, contact information, and delivery methods are precisely configured to prevent downstream invoicing errors.

  Reporting, Tracking & Process Improvement:

  Maintain accurate logs of all billing disputes, track resolution aging, and provide regular dispute status reports to manager.

  Identify recurring billing errors and proactively recommend process improvements to minimize future disputes and optimize the Order-to-Cash (O2C) cycle.

What You’ll Bring (Skills & Qualifications)

The ideal candidate will have:

• Minimum of 2 years of hands-on experience in Billing, Accounts Receivable (AR)/Payable (AP), Collections, or a highly related financial/dispute resolution role.

• Strong knowledge of invoicing, collection procedures, payment terms, and inventory management principles.

• Technical Skills: Strong proficiency in Microsoft Excel (including Pivot Tables and essential formulas) and competency in Google Workspace Suite.

• Proven ability in highly analytical skills, meticulous attention to detail, and independent problem-solving to investigate and resolve complex discrepancies effectively.

• Education Requirement: A Bachelor’s degree in Accounting, Finance, Supply Chain Management, Business Administration, or a related field. Prior experience using Oracle or another major ERP system is a significant plus.

What We Offer (Benefits)

• Salary details: 20,000 - 30,000 THB/Monthly.

• Shifts: Monday - Friday, 8:30 AM - 5:30 PM (Full-time Onsite).

• Location: Samut Prakan (Soi Wat Namdaeng) – Conveniently located near the MRT Yellow Line, Sri Dan Station.

• Competitive compensation and benefits aligned with the experience.

• Comprehensive health, wellness, and retirement plans.

• Opportunities for continuous learning and professional growth.