Accounts Receivable Specialist

Job Description

Job Description

About Proponent:

Proponent is the world’s largest independent, employee-owned distributor of aircraft parts, serving customers worldwide. With more than 600 employees across 14 global locations, we take pride in helping keep thousands of aircraft flying safely and efficiently every day. For over 50 years, we’ve built the systems, relationships, and expertise that aviation relies on, from responsive quoting and on-time shipments to data-driven improvements that reduce turnaround time and cost. As a 100% employee-owned company, everyone at Proponent is an owner, which means we share responsibility for our success, look out for one another, and bring dedication and creativity to aviation logistics. Guided by our core values, empathy, intelligence, agility and integrity, we work as a trusted partner to keep aircraft in service and customers moving forward. At Proponent, you’ll join a global team committed to doing things right and supporting each other, helping keep aircraft flying and the world connected.

Accounts Receivable Specialist

Job Location: Ontario, CA

Job Summary: 

The Accounts Receivable Specialist is responsible for supporting the accuracy, timeliness, and integrity of customer billing and payment activity. The ideal candidate is detail-oriented, organized, and comfortable working with high-volume transactions while maintaining a customer-focused approach. This role requires strong communication skills to resolve billing questions, follow up on outstanding balances, and partner effectively with internal teams. The successful candidate will demonstrate sound judgment, confidentiality, and a commitment to process accuracy and continuous improvement.

Job Responsibilities: 

• Process, post, and apply customer payments accurately and in accordance with company policies and procedures.
• Prepare, review, and maintain customer invoices, statements, credits, and account records.
• Monitor customer accounts for past-due balances, discrepancies, short payments, and other irregularities.
• Communicate with customers regarding payment status, billing questions, and collection follow-up while maintaining positive business relationships.
• Research and resolve billing discrepancies, unapplied cash, deductions, and customer account issues in a timely manner.
• Reconcile accounts receivable activity and support month-end close processes, reporting, and audit requests.
• Prepare and distribute aging reports, collection updates, and other accounts receivable metrics as needed.
• Collaborate with Sales, Customer Service, Operations, and Finance teams to resolve account issues and improve cash application and collection processes.
• Maintain accurate documentation and comply with internal controls, accounting procedures, and applicable regulatory requirements.

Requirements for Success:

• High school diploma or equivalent required; associate or bachelor’s degree in Accounting, Finance, Business Administration, or related field preferred.
• Working knowledge of basic accounting principles and accounts receivable processes.
• Proficiency with Microsoft Office, including Excel; experience with ERP or accounting systems preferred.
• Strong attention to detail, accuracy, organization, and follow-through.Excellent written and verbal communication skills with the ability to interact professionally with customers and internal stakeholders.
• Ability to prioritize tasks, meet deadlines, and manage multiple responsibilities in a fast-paced environment.
• Ability to handle confidential financial information with discretion and integrity

Benefits and Perks of joining the team: 

• Medical, Dental, and Vision plan options
• Employee Stock Ownership Plan
• 401k Plan
• Vacation, Sick, and Holidays
• Good work-life balance
• WFH Hybrid available for most positions