Billing Supervisor

About the role

NPK International Inc. (NYSE: NPKI) is the only site access solutions partner to manufacture and rent industry-leading sustainable composite matting, along with a full suite of services including planning, logistics, and remediation. The Regional Billing Supervisor leads and oversees daily billing and invoicing activities within an assigned region to ensure accurate, timely, and compliant invoicing practices, while providing leadership, coaching, and development for billing personnel and maintaining a personal portfolio of billing activities.

Responsibilities

• Supervise and support a team of billing and invoicing specialists, providing coaching, training, performance feedback, and development opportunities.
• Oversee daily billing operations to ensure timely and accurate customer invoicing.
• Maintain responsibility for a designated portfolio of customer accounts and billing activities.
• Review billing transactions for completeness, accuracy, and compliance with customer contracts, pricing agreements, and company policies.
• Monitor customer purchase order (PO) balances and coordinate with Operations and Sales to prevent billing delays.
• Resolve complex billing discrepancies, customer inquiries, and invoice disputes.
• Ensure supporting documentation is complete and properly maintained for billing, audit, and compliance purposes.
• Partner with Operations, Project Management, Sales, and Finance to streamline billing processes and improve operational efficiency.
• Monitor billing metrics, invoice aging, productivity, billing cycle times, and invoice accuracy.
• Assist with month-end and year-end close activities, including billing and revenue reconciliations.
• Develop, maintain, and enforce billing procedures, controls, and best practices.
• Identify opportunities for process improvements, automation, and system enhancements.
• Assist with internal and external audits by providing billing records and supporting documentation.
• Lead cross-functional initiatives related to billing process standardization and continuous improvement.
• Manage workload balancing and resource allocation across the regional billing team.
• Ensure compliance with company policies, customer requirements, and applicable financial controls.
• Escalate and communicate significant billing risks, issues, and trends to management as appropriate.

Requirements

• Associate’s degree in Business, Accounting, Finance, or related field preferred; equivalent work experience considered.
• Minimum of 5 years of billing, invoicing, accounting, or related experience.
• Minimum of 1–3 years of supervisory, team lead, or people management experience preferred.
• Strong understanding of billing processes, customer contracts, purchase orders, revenue recognition principles, and financial controls.
• Advanced proficiency in Microsoft Excel and Microsoft Office applications.
• Experience with ERP systems required; experience with Infor LN strongly preferred.
• Experience with document management systems and Adobe Acrobat preferred.
• Strong analytical, organizational, and problem-solving skills.
• Excellent communication, customer service, and conflict-resolution skills.
• Demonstrated ability to lead teams, manage priorities, and meet deadlines in a fast-paced environment.
• Strong attention to detail and commitment to accuracy.

Why join NPK?

NPK’s Core Value of Excellence means delivering value through performance, innovation, and service quality. NPK provides an environment that supports and values employees, offering opportunities to challenge yourself and grow professionally and personally.

Our values

• People Focused: First in every action
• United: Different voices make us stronger together
• Reliable: Unwavering in our quality and service
• Passionate: Energy and excitement is our fuel
• Optimistic: Any moment is a chance to shine
• Sincere: Authenticity starts with vulnerability
• Enterprising: Agility is the key to opportunity