Due to our continued growth, Castleross Construction is seeking a Senior Contract Administrator to join our team to assist on upcoming infrastructure projects across WA.

About Us

Castleross Construction is a WA-based civil contractor with a growing pipeline of marine, port and infrastructure projects across the Pilbara and metro Perth. We're looking for an experienced Senior Contracts Administrator to strengthen our commercial and contract's function, with a strong focus on FRP (Formwork, Reinforcement and Pouring) civil works.

The Role:

Reporting to the Head of Commercial & Project Controls, this is a hands-on role offering the chance to make a meaningful contribution within a growing company. You'll be preparing claims, assessing variations, reviewing contracts and supporting project teams day to day. You'll take ownership of the commercial administration of our civil and FRP project portfolio, from pre-contract review through to final account.

Key Responsibilities:

- Prepare and negotiate Extension of Time (EOT) and acceleration claims
- Prepare progress claims and payment assessments, and issue contractual notices
- Manage quantity growth, QMR (Quantity Measurement Report) type variations, and related entitlement assessments
- Support pre-contract and tender reviews, identifying commercial and contractual risk before award
- Review and negotiate back-to-back terms with suppliers and subcontractors, ensuring risk is appropriately passed down
- Provide commercial administration support across FRP and civil project delivery, including cost tracking and reporting
- Work closely with project managers and site teams to protect margin and manage contractual risk




- Support procurement and lease/hire agreement reviews for major plant and equipment

What we're looking for:

- Proven experience as a Senior Contracts Administrator, Contracts Administrator, Commercial Manager or similar within the civil construction industry
- Previous experience working on FRP (formwork, reinforcement and concrete) projects is highly regarded
- Strong experience preparing and managing Extension of Time (EOT) and acceleration claims
- Demonstrated experience preparing progress claims, payment assessments and contractual notices
- Strong understanding of variations, quantity growth and QMR-type contractual mechanisms
- Experience reviewing, negotiating and managing back-to-back subcontracts and supplier agreements
- Relevant tertiary qualification in Quantity Surveying, Construction Management, Engineering or a related discipline
- Excellent negotiation, drafting and stakeholder management skills

What's on offer:

- Competitive salary package, negotiable based on experience
- Genuine autonomy and influence over commercial strategy
- Exposure to a strong pipeline of civil and marine infrastructure projects across WA
- A growing pipeline of work with genuine opportunity to grow with the company, with a pathway toward roles such as Contracts Manager, Commercial Manager or Pre-Contract Manager as the business expands
- Supportive, close-knit commercial team

To Apply, please submit your application below. Castleross Construction is an equal opportunity employer are an equal opportunity employer committed to creating an inclusive and diverse workplace. We encourage applications from people of all backgrounds, including Aboriginal and Torres Strait Islander , and people from culturally diverse backgrounds .

📌 Senior Contracts Administrator (Perth)
🏢 Castleross Construction
📍 Perth