Office Manager / Administration Assistant

ACorp; Muswellbrook; On-site; AUD 24,000 - 27,000; Part time

Job summary

ACorp is seeking an organised, friendly office administrator to support three locations (Sydney, Newcastle and Muswellbrook). The role is 20 hours per week across four days, 10am–3pm, based in the Muswellbrook office.

You will manage calls, emails, scheduling and general office tasks to keep our operations running smoothly. You will liaise with teams across locations, handle records, onboarding, invoicing and supplier coordination, contributing to a reliable, welcoming environment.

Qualifications

• Experience in an office administration or reception role.
• Strong organisation skills and attention to detail.
• Confidence with Microsoft 365 (Outlook, Word, Excel).
• A warm, professional manner on the phone and in person.

Responsibilities

• Be the first friendly voice for clients and visitors: answer calls, manage the inbox and direct enquiries.
• Keep all three offices running: supplies, deliveries, suppliers and general upkeep.
• Support the team across locations with scheduling, bookings and diary management.
• Help with invoicing, data entry and keeping client records up to date.
• Assist with onboarding new staff.
• Coordinate team events.

Skills

Office administration

Reception

Organisation

Microsoft 365

Communication

Tools

Microsoft 365

Job description

ACorp is a native managed service provider supporting small and medium businesses across Australia from our offices in Sydney, Newcastle and Muswellbrook. We look after their IT, cybersecurity and connectivity so they can get on with running their business. We're growing (we ranked #36 in the Tech Partner News Fast 50 for 2025), and we're looking for an organised, friendly person to keep our offices running smoothly.

This is a part‑time role: 4 days a week, 10am to 3pm. The hours suit school drop‑off and pick‑up. You'll be based in our Muswellbrook office and look after office management and admin for all three of our locations: Sydney, Newcastle and Muswellbrook.

What you'll do

• Be the first friendly voice for clients and visitors: answer calls, manage the inbox and direct enquiries
• Keep all three offices running: supplies, deliveries, suppliers and general upkeep
• Support the team across locations with scheduling, bookings and diary management
• Help with invoicing, data entry and keeping client records up to date
• Assist with onboarding new staff
• Coordinate team events

How we work

Our five values shape how we treat clients and each other. In this role, that looks like:

• Human centric service: being responsive and approachable, and staying calm and kind when a client is stressed
• Integrity: honest communication and following through on commitments
• Security: handling client and company information with care (we're ISO 27001 certified, so this matters to us)
• Innovation: spotting a better way to do things and suggesting it
• Excellence: attention to detail and reliable delivery

What you'll bring

• Experience in an office administration or reception role
• Strong organisation skills and attention to detail
• Confidence with Microsoft 365 (Outlook, Word, Excel)
• A warm, professional manner on the phone and in person
• The ability to juggle tasks and work independently, including supporting teams you won't always see face to face
• A current driver's licence and your own reliable vehicle (essential)

What you'll get

• 20 hours a week across four days [days to be agreed]
• A supportive, down-to‑earth team in a growing business

Applications close 30th of November 2026.