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Billing Specialist

Daikin Applied · Elmhurst, IL · $27.00–$29.80 an hour · Full time

Posted Oct 5, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you used judgment on a billing or credit issue instead of following a set rule.

What they are checking: Whether they can make sound decisions on significant accounting items, as the posting asks.

How do you communicate with a manager when you find a billing error that came from their team?

What they are checking: Whether they can raise mistakes tactfully and help fix the process upstream.

How do you keep up with a heavy volume of invoices without losing accuracy?

What they are checking: Their methods for managing volume while keeping error rates low.

What would you do

A customer disputes a service invoice and says the work was never done. What do you do?

What they are checking: Whether they gather documentation and work with service staff before deciding how to respond.

What do you do when a customer account goes past due?

What they are checking: Their approach to collections that protects cash flow without damaging relationships.

A vendor calls asking why their payment is late. How do you handle the call?

What they are checking: Professionalism with vendors and ability to research and resolve payment questions.

About the work

Walk me through your daily process for processing AP and AR invoices.

What they are checking: Whether they have a reliable routine that keeps billing timely and accurate.

How do you prepare a bi-monthly AP check run and make sure nothing is paid twice?

What they are checking: Controls awareness around duplicate payments, approvals and vendor verification.

How do you bill for a service call that includes labor, parts and travel?

What they are checking: Understanding of how HVAC service and parts billing are built from work orders.

Which accounting or ERP systems have you used, and how comfortable are you in Excel?

What they are checking: Familiarity with the tools needed to process billing efficiently.

Practice this interview out loud.

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The full job description

As published by Daikin Applied.

About Thermosystems: Founded in 2000, Thermosystems, a member of the Daikin group, is a manufacturer’s representative specializing in commercial heating, ventilation, and air conditioning (HVAC) products and controls. Our mission is to be the trusted partner behind complete HVAC solutions, bringing the expertise and guidance our customers deserve—because better buildings start with better partners. Headquartered in Elmhurst, Illinois, we operate offices in Elmhurst, Romeoville, Peoria, Chicago, the Quad Cities, and Des Moines. Our organization includes dedicated equipment, solutions, and service sales teams, along with a comprehensive parts and full-service department to support the products we represent. We offer a comprehensive benefits package that includes medical, dental, and vision insurance; short-term disability and life insurance; paid time off and paid holidays; and a 401(k) with profit sharing, among other benefits. At Thermosystems, you will be encouraged to grow, apply what you know, and see the impact of your hard work. If you want to learn more about Thermosystems, visit us at www.thermohvac.com today! Location: Elmhurst, IL Responsibilities: • Processes AP/AR invoices and billing daily. • Complete bi-monthly AP check runs. • Uses judgment to make decisions on significant accounting items dealing with billing, credit, etc. • Communicate with both management and customers on issues revolving around billing. • Enters Utility and Employee expenses. • Assist Service Department with invoicing. • Complete credit memo log and audit monthly. • Complete a weekly shipment audit. • Communicate with sales team on a regular basis. • All other duties assigned. Qualifications: • Associate or bachelor’s degree in an accounting related field is preferred. • Proven experience in the accounting field. • Highschool diploma or GED is required. • Must have background using Microsoft 365 Suite. Knowledge, Skills, and Abilities: • Attention to detail. • Ability to communicate clearly and have strong communication skills. • Team player and willing to help others. • Ability to work under pressure and meet deadlines. • Self-motivated and can work independently. The typical hourly rate for this position ranges from $27.00 - $29.80 / hr. in Illinois. The range displayed represents the pay range for all positions in the job grade in which this position falls. Individual base pay will depend on a wide range of factors including your skills, qualifications, experience, and location. If you're looking for an engaging career with growth opportunities in a supportive environment, you'll love a career at Thermosystems! Employment is contingent upon successful completion of pre-employment requirements, including verification of employment history, education, background screening, and drug testing where permitted by law. Safety-sensitive positions may require cannabis (marijuana) testing. All testing and employment decisions will comply with applicable federal, state, and local laws.

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