Accounts Receivable Intern, Cash Applications

ProSomnus Sleep Technologies is a medical device company focused on precision oral appliances for the treatment of obstructive sleep apnea and snoring. We manufacture custom devices prescribed by dentists and sleep physicians, and we partner with dental practices across the country. Our finance team supports a growing organization with a strong emphasis on disciplined processes, clean documentation, and audit-ready records.

Position Summary
This role begins with a focused scope on cash applications and broader Accounts Receivable support, with a clear opportunity to grow into a more typical collections role over time. To start, you will help match and apply incoming customer payments, research unapplied cash and discrepancies, and keep clean supporting documentation. As you build fluency in our systems and process, the role can expand into customer outreach, aging follow-up, and dispute resolution. This is a learning-focused position designed for a student or early-career candidate who wants hands-on exposure to the order-to-cash cycle in a real finance organization. You will work closely with the General Ledger Accountant.

Key Responsibilities

To start (cash applications and AR support):

• Match incoming customer payments (check, ACH, credit card, and lockbox) to open invoices in QuickBooks Online (QBO).
• Research and resolve unapplied cash, short pays, and remittance discrepancies using order and customer data from Magic Touch.
• Maintain accurate records of applied and unapplied payments, and prepare items for review and posting by the accounting team.
• Help compile supporting documentation for AR and cash reconciliations in FloQast.
• Keep a running status of open items, with clear notes for the team.
• Support ad hoc reporting and projects for the finance team as needed.

As the role grows (collections):

• Monitor the accounts receivable aging and help identify past-due accounts for follow-up.
• Conduct courteous, professional outreach to customers (primarily dental practices and distribution partners) regarding open and past-due invoices.
• Draft customer statements and reminder communications for review before they are sent.
• Escalate aged or disputed balances, with a recommended next step, to the General Ledger Accountant.

A note on controls: The intern prepares, researches, and recommends. Adjustments, write-offs, cash posting, and final customer communications are reviewed and approved by the accounting team. This keeps a clear separation between preparation and approval.

What You Will Learn

• Hands-on cash application and the mechanics of matching payments to invoices.
• The full order-to-cash cycle in a medical device environment.
• Practical use of QuickBooks Online and FloQast.
• How cash application, collections, and the monthly close connect.
• Professional business-to-business customer communication.
• How clean documentation supports a financial statement audit.

Qualifications

• Comfortable with Excel (sorting, filtering, and basic formulas such as SUM and VLOOKUP or XLOOKUP).
• Clear, professional written and verbal communication.
• Detail-oriented, organized, and able to follow a documented process.
• Reliable and responsive in a remote setting.
  
• Magic Touch experience a plus but not required
  
• Prior exposure to QBO, FloQast, or an ERP system is a plus but not required.
  
• Comfortable handling sensitive financial information with discretion.

Logistics

• Remote, U.S. based. Must be available to work for 2-3 hours between 8 and 5 PM PST for team overlap and training purposes
  
• Part-time, approximately 15 to 25 hours per week.
• Reliable internet and a quiet workspace for customer calls.