At World Fuel, our employees are the key to our global success. We are industry leaders due to the innumerable talents of our approximately 5000 strong professional team. Our people thrive in an entrepreneurial and culturally-diverse environment, where innovative thinking, collaboration and efficient execution are highly valued. Our high-performance culture is what allows us to drive sustained growth. Stronger together, we promote an environment where individuals can thrive. Senior Billing Specialist, NATO Services Houston, TX (Hybrid) World Fuel is seeking a detail-oriented and highly organized Senior Billing Specialist to support billing operations for a strategic international customer under the NATO Support and Procurement Agency (NSPA) services program. This role serves as the primary billing subject matter expert, managing complex customer invoicing processes, validating supporting documentation, resolving billing discrepancies, and ensuring timely and accurate invoicing across global transactions. This is an excellent opportunity for a billing professional who thrives in a fast-paced environment, enjoys solving complex challenges, and takes pride in delivering exceptional service to internal and external stakeholders. What You'll Do Manage End-to-End Billing Operations Serve as the primary billing specialist supporting NSPA services transactions. Prepare, review, and process invoices in accordance with customer and contractual requirements. Validate billing information before invoice generation and submission. Ensure invoices are accurately processed and submitted on schedule. Support timely customer billing, accounts receivable accuracy, and merchant payment processing. Prepare Invoice Packages and Supporting Documentation Create complete customer invoice packages for submission. Review and validate supporting documentation, approvals, and required signatures. Coordinate with internal stakeholders to obtain missing information. Ensure delivery tickets and supporting records are properly matched to invoices. Conduct quality reviews of billing packages prior to customer submission. Support Customer-Specific Billing Requirements Manage customer-specific invoice templates and billing files. Prepare and organize billing documentation according to customer requirements. Ensure invoice packages comply with established submission guidelines and formats. Support recurring billing cycles and reporting requirements. Validate Pricing and Billing Accuracy Apply approved pricing structures and billing rules. Review invoices for accuracy and compliance with contract requirements. Support location-specific and customer-specific billing configurations. Coordinate with commercial, finance, and operations teams to resolve pricing discrepancies and billing exceptions. Resolve Billing Discrepancies Investigate invoice issues and identify root causes. Process billing corrections, credits, and rebills as necessary. Maintain documentation supporting all billing adjustments. Ensure billing records remain accurate and audit-ready. Support Customer Dispute Resolution Research billing disputes and invoice inquiries. Partner with internal stakeholders to resolve customer concerns. Track open issues through completion. Implement corrective actions and billing adjustments when required. Drive Quality and Process Excellence Perform detailed pre-submission reviews of invoices and supporting documentation. Identify and address potential issues before customer submission. Maintain strong process controls and documentation standards. Help reduce billing errors, disputes, delays, and rework. Escalate significant billing issues when appropriate. What We're Looking For Required Qualifications 3+ years of experience in billing, accounts receivable, finance operations, contract administration, or related areas. Experience managing complex customer invoicing and billing processes. Strong proficiency in Microsoft Excel, including data validation, formulas, and reporting. Exceptional attention to detail and accuracy. Strong analytical and problem-solving skills. Ability to manage multiple priorities and meet deadlines in a fast-paced environment. Excellent written and verbal communication skills. Preferred Qualifications Experience supporting contract-based or government-related billing environments. Knowledge of accounts receivable and billing controls. Experience managing credits, rebills, and dispute resolution processes. Familiarity with ERP or financial systems such as SAP, Oracle, Workday, or similar platforms. Experience supporting international customers or global billing operations. Why Join Us? At World Fuel, you'll be part of a global organization supporting critical aviation and business operations around the world. This role offers the opportunity to own a highly visible billing function, collaborate across global teams, and make a direct impact on the success of a strategic customer relationship. #WFS World Fuel is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected veteran status, age, or any other characteristic protected by law. World Fuel Services, Inc. At World Fuel, our people "Fuel Their Careers". We work in more than 150 locations worldwide and come from a diverse range of cultural backgrounds that offer an equally diverse range of skills. As a global leader in the fuel industry, World Fuel offers exceptional individuals the opportunity to become part of a truly successful international corporation. We are proud to be among the Fortune 100 companies.

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