Commercial Construction | Complex Projects | Brisbane or Sunshine Coast

At Plexxcon, we don’t just build projects, we build relationships, solve complex problems, and back our people to do their best work.

We’re a growing commercial construction company specialising in complex projects across Southeast Queensland, and we’re looking for a Intermediate or Senior Contracts Administrator who wants more than “just a job”.

This is a role for someone who thrives in a fast-paced environment, values teamwork, takes ownership, and takes pride in delivering quality commercial outcomes.

We’re looking for an experienced Contracts Administrator located at either our Geebung or Warana to take the lead on our most complex projects and help support and develop the junior administrators in our project teams. If you love working with people as much as you love a well-run contract, this one’s for you.

Why Plexxcon?

You won’t be a number here. You’ll be part of a tight-knit team where people look out for each other, share what they know and win together. Our values shape how we work every day:

Relationships: We care about our team and the people we work with. We build trust with each other, our clients and our subbies, and that’s what keeps projects moving.

Provide Value: We know why our clients choose Plexxcon. Sharp claims, accurate reporting and clean documentation are part of that.

Solutions: We focus on the outcome. When a variation or EOT gets tricky, we work through it together and find the smart path forward.

Hustle: We push the boundaries to deliver. We take ownership, back each other up and get it done.

We invest in our culture as much as our projects.

Bi-monthly team BBQs, regular social events, and a leadership team that is accessible and involved mean you’ll actually enjoy coming to work and feel proud of what you deliver.

If you want a company that trusts you, challenges you, and has your back, Plexxcon is that place.

The role

You’ll be the commercial lead on our largest and most complex projects.



You’ll work side by side with our Project Managers, Site Managers and our leadership team. You’ll also be a go-to mentor for the junior administrators in our project teams, sharing your knowledge, building their confidence and helping lift how we do contract admin across the business.

You’ll be:

- Leading contract administration on our most complex projects, from award to final handover and beyond
- Supporting, coaching and developing junior administrators across our project teams
- Administering head contracts and subcontracts (AS4000, AS4902 and bespoke forms)
- Preparing and submitting monthly progress claims
- Managing variations, EOTs, notices and time-related claims
- Procuring and awarding trade packages, including scope preparation, reviews and negotiation
- Assessing subcontractor claims and making sure payments comply with the BIF Act
- Monthly cost reporting, forecasting and cost-to-complete
- Working with estimating on tender handover and post-award contract reviews
- Helping shape and improve our contract admin systems as we grow

What we’re looking for

- 5+ years’ contract administration experience with a Queensland builder, ideally on complex projects
- Strong working knowledge of AS-series contracts and the BIF Act
- A natural team player who enjoys mentoring and sharing knowledge
- Commercial confidence, plus the people skills to keep relationships strong
- A problem-solver who takes ownership and brings others along
- Well organised and able to juggle several projects at once
- Tertiary qualification in Construction Management, QS or similar (preferred)
- Experience with Jonas Premier, ProcurePro or HammerTech is a bonus
- Current QLD driver’s licence and White Card

What you’ll get

- Competitive salary package
- Flexibility to work from Brisbane or the Sunshine Coast
- A supportive, down-to-earth team that backs its people
- Direct access to leadership and real input into how we do things
- A leadership role in developing our project teams
- Ongoing training and a explicit pathway to grow with the business

#J-18808-Ljbffr

📌 Contracts Administrator (Brisbane)
🏢 Plexxcon
📍 Brisbane