Are you a skilled Estimator with a robust construction background and a passion for delivering accurate, practical solutions?

This is more than a desk-based estimating role. You’ll play a key part in bringing projects to life by preparing estimates, assessing site conditions, identifying risks, and working closely with our Operations Team, Site Managers and Subcontractors to support successful project delivery.

If you enjoy problem-solving, variety and being involved from planning through to construction, we’d love to hear from you!

About Us:

WABi Systems Australia aims to disrupt the traditional building industry by offering innovative and patented modular housing solutions that embody the company’s philosophy of “simpler, smarter and stronger.” WABi’s core belief is that everyone deserves a home – “a home for all.” This mission drives the company’s efforts to make housing more accessible, sustainable, and appealing to modern consumers. With roots in Fremantle, WABi Systems Australia is uniquely positioned to attract talent and push boundaries of what is possible in the construction sector.

About You:

You know that the best estimates don't come from drawings alone. You're just as happy pulling on your boots for a site visit as you are putting together a detailed estimate back in the office. By asking the right questions and understanding the real-world challenges of each site, you produce practical, accurate estimates that set projects up for success.

You’ll have:

- Proven experience in estimating within the residential, commercial or modular construction industry
- A strong understanding of construction methodologies, site works and project delivery
- The ability to assess site conditions and identify factors that may impact project costs, timelines and constructability
- Experience interpreting building plans, engineering drawings, specifications, Australian Standards and relevant building codes
- Knowledge of site access, logistics, excavation requirements, utilities, environmental constraints and other factors affecting construction projects
- Experience preparing detailed estimates, tender submissions and project costings, including labour, materials, subcontractors, freight and plant
- Strong commercial acumen with the ability to monitor budgets, analyse cost variances and identify opportunities for cost efficiencies
- Experience working with estimating software (such as Buildxact or similar) and confidence using CRM and Microsoft Office applications
- Excellent organisational,



time management and communication skills with the ability to manage multiple priorities
- The ability to build and maintain effective working relationships with suppliers, Subcontractors, Site Managers, Project Managers and internal stakeholders
- A proactive approach to continuous improvement, quality assurance and process optimisation
- A current Australian Driver's Licence
- The ability and willingness to undertake travel to project locations for site inspections

About The Role:

Develop comprehensive estimates for labour, materials, plant, freight, subcontractors and project timelines.

Conduct occasional site visits to assess project conditions and identify factors that impact construction costs, including:

- Site access and logistics
- Terrain and ground conditions
- Excavation and earthworks requirements
- Service connections and utilities
- Environmental, heritage or council restrictions
- Equipment access and mobilisation requirements
- Site-specific construction challenges and risks

Interpret building plans, engineering drawings, specifications, regulations and building codes to ensure accurate estimating and compliance.

Work with the Operations Team to develop realistic project timelines that meet client and project delivery requirements.

Work with the Operations Team, Site Managers and subcontractors to plan and schedule trades for projects, ensuring labour requirements are aligned with project timelines, site conditions and construction delivery requirements.

Prepare estimates and costings for new tenders and project variations.

Liaise with Site Managers, Project Managers and Construction teams to ensure estimates accurately reflect site conditions and construction methodologies.

Utilise Estimating Software with Purchasing Officer to:

- Process purchase orders for labour and materials
- Maintain an accurate product catalogue with monthly pricing updates
- Create and maintain recipes for all product configurations
- Identify and implement continuous improvements to estimating systems and processes





Work with the Operations Team to develop efficient systems for delivering projects and materials to regional and remote project sites.

Monitor project budgets against actual costs and report on significant variances.

Ensure accurate and timely entry and maintenance of information within the CRM and estimating systems.

Manage quality assurance procedures, including reporting and resolution of non-conformance issues.

Maintain oversight of estimating systems, software and departmental processes to ensure continuous improvement and best practice.

What We Offer

Immediate Start!

A ridiculously awesome team – supportive, passionate, and driven!

Spontaneous banter, and the occasional cake!

Opportunities to grow your career and learn cool new things

Early knock off Fridays

Employee Assistance Program

5 Reasons Why You Should Work at WABi Systems Australia

Innovation at the Core: Join a globally recognised leader in eco-friendly accommodation solutions, where you'll collaborate with an innovative team that nurtures passion and creativity! Our people unite to dream big and deliver simpler, smarter and stronger rapid building solutions worldwide!

Positive Global Impact: Be part of a team and mission that contributes to meaningful projects that make a difference. Our work has a tangible impact on the environment and community, and we value employees who are passionate about creating positive change for a more sustainable future.

Inclusive and Supportive Culture: WABi Systems is an equal opportunity employer, so by coming to work for us, you’ll be part of an organisation that encourages diversity, supports charities and environmental initiatives. We encourage people of all backgrounds to apply.

Opportunities for Professional Growth: Our team offers a wide range of opportunities, allowing you to grow both personally and professionally. We prioritise your development, empowering you to advance your career through exciting and meaningful projects.

Comprehensive Benefits: Take advantage of a wide range of benefits, including our Employee Assistance Program, flexible working arrangements, travel opportunities, competitive rewards, incentive bonuses, and a strong emphasis on employee well‑being and a positive workplace culture.

Direct applicants only – no agencies please. Only successful candidates will be contacted for an interview.

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📌 Estimator / Project Administrator (Fremantle)
🏢 Calsen
📍 Fremantle