AR/AP Manager - Marmon Holdings

As a part of the global industrial organization Marmon Holdings —which is backed by Berkshire Hathaway—you’ll be doing things that matter, leading at every level, and winning a better way. We’re committed to making a positive impact on the world, providing you with diverse learning and working opportunities, and fostering a culture where everyone’s empowered to be their best.

Who We Are

Railserve is a leading provider of industrial railyard services across the United States and Canada. Our teams deliver on‑site rail switching, material handling and transloading, track construction and maintenance, and locomotive service and repair for customers who depend on safe, reliable rail operations every day. With decades of industry experience, Railserve is built on a foundation of safety, teamwork, and operational excellence. We invest in our people, promote from within, and use innovative, safety‑focused technology to keep railyards running efficiently. Learn more at www.railserve.com

Position Summary

Railserve is seeking an Accounts Receivable / Accounts Payable (AR/AP) Manager to oversee the day-to-day operations of our AR and AP functions. This role is responsible for ensuring accurate, timely, and compliant financial processing across the organization while maintaining strong internal controls and adherence to company policies and accounting standards.

The AR/AP Manager will lead AR and AP staff, support billing, collections, and vendor payment processes, and partner closely with Operations, Accounting, and Finance teams. This role plays a critical part in cash flow management, audit readiness, and driving process improvements while maintaining strong relationships with customers, vendors, and internal stakeholders.

What You’ll Do

• Review and support credit approvals and customer onboarding processes from a financial perspective
• Lead accounts payable operations, including invoice processing, coding, approvals, and payment execution
• Ensure timely and accurate vendor payments in accordance with company controls and payment terms
• Serve as the escalation point for vendor inquiries and payment-related issues
• Maintain accurate vendor records and support spend management programs (e.g., P-card, expense, and travel)
• Provide leadership, coaching, and performance management for AR/AP team members
• Support audits, maintain internal controls, and ensure compliance with accounting standards and company policies
• Prepare and review AR/AP metrics, reconciliations, and support month-end close activities
• Identify opportunities for process improvement and partner on system enhancements and automation initiatives

What You Bring

• 7+ years of progressive experience in accounts receivable, accounts payable, or accounting operations
• Strong knowledge of AR/AP proces