Administration Assistant / Officer | Project Office | Fantastic Employer
A great opportunity to join a well-established Australian employer in their construction division, as an Administration Officer based out of a key project office in the South West.
Known for a strong team culture and supportive environment, there is low staff turnover and genuine investment in internal progression and development.
This is a role for someone who enjoys owning the administrative function, being across the detail and proactively improving processes along the way - you will be working with a highly respected Project Manager, and their longstanding team to support a key construction project from the ground up.
You will also work closely with the Head Office Administration team.
Your role
Sitting at the centre of a busy project environment, you will play a key role in supporting both the project admin, payroll admin and accounts function, ensuring operations run smoothly day-to-day for the site.
Your responsibilities will include:
Managing and maintaining employee timesheets, ensuring correct allocation of hours to support payroll processes
Building strong relationships with internal teams and suppliers, providing timely updates and resolving queries efficiently
Processing supplier invoices and supporting end-to-end accounts administration, including creating purchase orders, ensuring accuracy and compliance with internal procedures
Coordination and administration support across the project, including document control and record keeping.
Supporting Project Managers with reporting, reconciliation and project documentation




Office Management of the site office day to day including ordering supplies, consumables, food etc.
Creating purchase orders, general data entry and broader administrative support
Contributing to process improvements and helping maintain efficient workflows across the team
This role is full-time onsite based primarily from the Bankstown Project office with the team onsite from 7.00am which means this role suits an early bird.
Who you are?
You are organised, detail-oriented and reliable and enjoys being the person who keeps everything on track.
You also enjoy a little banter and building strong connections with your team - this is a team that likes a laugh amidst the demands of work.
Previous administration experience within construction, building or engineering environments (helpful but not essential)
Robust attention to detail with excellent time management skills
Confident across Microsoft Office, particularly Excel (formulas, conditional formatting; VLOOKUPs helpful but not essential)
Able to work autonomously while also contributing to a collaborative team environment
Proactive, adaptable and solutions-focused mindset
Why this organisation?
They are a national business with a extremely solid reputation in the market
This isa genuinely supportive team with an excellent culture
You have the opportunity to take ownership of your role and contribute to process improvements
Long-term career progression opportunities within a growing organisation.
Great added benefits including; extra leave benefits as RDO's, a great employee incentive program, employee discounts and rewards
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📌 Administration Assistant / Officer | Project Office | Fantastic Employer (Sydney)
🏢 ONA Recruitment
📍 Sydney