Office manager

We are seeking an experienced and highly capable Office Manager to work full time Monday‐Friday. Working closely with senior management, the successful candidate will play a key role in driving operational consistency, improving accountability, and supporting scalable business growth.

• Processing invoices, purchase orders and supplier payments.
• Reconciling supplier statements and resolving discrepancies.
• Managing credit card and bank reconciliations.
• Weekly payroll for approximately 35 staff.
• Use of MYOB.

• Overseeing day‐to‐day office operations, including suppliers, systems, and front office tasks.
• Supporting Executive Managers administrative tasks.
• HR administration including recruitment, onboarding, maintaining staff records, and compliance documentation.
• Formatting, proofreading, and reviewing key documents for accuracy and presentation.
• Ensure accuracy and integrity of financial and operational data.
• Drive improvement in administration workflows and communication standards.
• Strengthen coordination between Office, Managers and Field Technicians.
• Identify and address process gaps, inefficiencies and revenue leakage.
• Build and maintain strong follow‐up and accountability across the team.

You will have proven experience in office management, HR, accounts and administration. Be a proven leader who takes ownership, sets standards and ensures things are done properly.

You are not just task‐focused — you actively identify issues, follow them through and implement practical improvements.

You will bring:

• Strong experience in administration/accounts/payroll/HR leadership within a service, operational field‐based business.
• Solid background in HR, payroll and accounts processes.
• Proven ability to improve systems, processes and team accountability.
• High attention to detail combined with a practical, outcomes‐focused mindset.
• Confidence to hold standards, follow up and address issues directly.
• Clear, structured and effective communication skills.
• Strong systems capability – MYOB, Simpro, Microsoft 365, Employment Hero.
• MUST HAVE – Full Working Rights in Australia.

• A strong sense of ownership and accountability.
• Ability to identify problems early and take action.
• A structured, disciplined and reliable approach.
• Commercial awareness – understanding how errors impact revenue and efficiency.

Please send a cover letter explaining your experience along with a current resume.

Ballantyne's is a leading plumbing and electrical company that has been serving the Mandurah community for over 40 years. We pride ourselves on our commitment to quality, safety and customer satisfaction. Join us and be a part of our continued success.