NJM Design is a multi-disciplinary building services engineering consultancy based in the Melbourne CBD, servicing clients across Australia. With 21 years in operation, we deliver over 500 projects each year across a broad range of sectors and operate under two ISO accreditations, reflecting our commitment to quality, systems, and compliance.
We are seeking an experienced and highly organised Office Manager to to take ownership of the day-to-day coordination and smooth operation of our Melbourne office. This is a varied, hands-on role suited to someone who enjoys being across the detail, solving problems, supporting people and making sure things get done. You'll work closely with our Directors, management team and staff, coordinating office operations, administration, suppliers, facilities and a range of business support activities.
We're seeking someone who is proactive, practical and accountable, who notices what needs to be done and takes ownership.
The Opportunity
As Office Manager, you will play an important role in supporting the day-to-day running of NJM Design. No two days will be exactly the same, and the role will suit someone who enjoys variety, working with people and having responsibility across a broad range of business activities.
You'll have the opportunity to take ownership of office operations while also supporting the wider administration and management team across business requirements as they arise.
What You'll Do
Take responsibility for the smooth day-to-day operation of the Melbourne office
Manage office facilities, repairs, maintenance, trades and building requirements
Coordinate office supplies, stationery, kitchen supplies and general procurement
Manage relationships with office suppliers, contractors and service providers
Coordinate incoming calls, visitors and general enquiries
Provide administrative and business support to Directors and management as required
Assist with finance administration, invoices, expenses and data entry




Prepare and maintain Excel reports and administrative records
Coordinate meetings, catering, office events and team requirements
Support onboarding and induction requirements for new employees
Assist with office policies, procedures and administrative systems
Help maintain a professional, organised and welcoming office environment
Identify opportunities to improve office processes, systems and efficiency
Assist with staff activities, celebrations and internal communications
Ensure shared spaces, kitchen facilities and amenities are clean, organised and well presented
Take on additional projects and responsibilities as the business continues to grow
Who We're Looking For
We're looking for an experienced Office Manager, Office Coordinator or senior administrator who enjoys taking ownership and being the person others can rely on to keep things moving.
Most importantly, you will be:
Reliable and accountable – you follow through and take ownership.
Highly organised – you manage competing priorities and attention to detail.
Practical and proactive – you use initiative and look for solutions.
Proficient in Microsoft Office
Willing to contribute – you understand that every task, big or small, helps keep the business running.
Professional and approachable – you communicate confidently with colleagues, clients and suppliers.
Previous experience in an Office Manager, Office Coordinator, Executive Assistant, Senior Administrator or similar role would be highly regarded.
Experience within a professional services, engineering, construction or consulting environment would also be advantageous, but is not essential.
9-day working fortnight
Paid full-day leave for your birthday
Paid parental leave
Melbourne CBD location, close to public transport
Regular in-office social events
Staff referral program
Annual performance reviews and pay increases
If you're looking for an chance to start in a broad business support role, learn quickly, take ownership and develop into something bigger, we'd love to hear from you.
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📌 Office Manager (Melbourne)
🏢 NJM Design
📍 Melbourne