Accounts Receivable / Billing Administrator

We are looking for a reliable and detail-focused Accounts Receivable / Billing Administrator to join our Finance team in Hamilton on a part-time basis. Reporting to the Chief Financial Officer, you will help ensure customer billing is accurate and timely, receivables administration runs smoothly, and customer queries are handled professionally.

Key Responsibilities

Prepare, validate and issue customer invoices in line with billing schedules, contracts and agreed deadlines. Process approved credit notes, invoice corrections and customer refunds, maintaining clear supporting documentation and audit trails. Manage the shared accounts receivable inbox and respond to customer queries about invoices, balances, statements, payments and refunds.

Support overdue account follow-up through reminders, phone calls, statements and agreed collection activities. Assist with payment allocation, reconciliations, statement runs and investigation of aged or unusual balances. Work closely with the wider Finance team and operational teams to resolve discrepancies and improve processes.

About you

Previous experience in accounts receivable, billing, finance administration or a similar high-volume transactional role. A practical understanding of invoicing, credit notes, refunds, debtor ledgers and basic reconciliations. Experience using Xero and the Microsoft 365 suite. Strong numerical accuracy and attention to detail.

Clear written and verbal communication, with a professional customer service approach. The ability to prioritize competing deadlines, manage a shared inbox and follow through on outstanding matters. A respectful but confident approach to following up on overdue payments. What success looks like You will be known for accurate, on-time billing; responsive customer service; consistent follow-up of overdue accounts; and well-maintained records that provide a clear audit trail.

You will also be a dependable team member who supports the Finance team during busy billing and collection cycles. About the Company We are a privately-owned business and a market leader for fire protection and building compliance services across New Zealand. The fire protection industry is about life safety . We live by our values of Courage, Pride, Integrity and Ambition.

Looking to be better tomorrow than we were today it’s about doing what’s right, not what is easy. Apply now If you are an organized finance administrator who enjoys getting the details right, solving discrepancies and helping customers, we would like to hear from you. Please submit your CV and a brief cover letter outlining your relevant experience.