Position Title: Senior Cost Estimator

• Location: Perth
• Contract Type: Employee Maximum Term
• Duration: 2 Years

At INPEX, our energy is helping to shape a brighter future.

We are proudly supporting positive outcomes in Australian communities, through jobs, training, and social and economic benefits. Our Australian energy portfolio includes Ichthys LNG which we operate, plus participating interests in Prelude FLNG, Darwin LNG, Van Gogh and Ravensworth. We are actively pursuing carbon, capture, and storage opportunities to help provide a cleaner upstream business for Ichthys LNG.

Our inclusive culture is key to our success – valuing diversity and bringing us together as a connected and innovative team. As an international company, INPEX offers unique opportunities to collaborate with colleagues from across the globe. We are keen to attract and develop passionate, motivated, and safety-minded people from all backgrounds who want to help support society’s growing need for secure, affordable, and clean energy.

We are seeking a Senior Cost Estimator to join our INPEX Development team in Perth on an Employee Max Term 2 Year contract. Join us in helping shape a brighter energy future.

Key responsibilities:

The Senior Cost Estimator is responsible for the development of accurate and robust capital cost estimates, along with associated analysis and reporting, across all project phases. The role supports decision-making by providing high-quality cost insights for offshore oil and gas developments.

• Develop capital cost estimates for offshore facilities, including fixed and floating platforms, subsea systems, pipelines, FPSOs and associated infrastructure, including conceptual to detailed estimates.
• Prepare time-based cost phasing and forward escalation assessment.
• Build and maintain cost models using engineering data, historical information, and industry benchmarks.
• Prepare independent company estimates for comparison against contractor bids.
• Review contractor and vendor quotations to validate scope coverage and pricing assumptions.
• Analyse key cost drivers, including materials, labour, equipment, logistics, installation, and contracting strategies.

What we’re looking for:

We welcome candidates from diverse backgrounds and experiences. You will be a strong fit for this role if you bring: 

• Bachelor’s degree in Engineering, Quantity Surveying, Construction Management, or related discipline preferred.
• Extensive experience in cost estimation within oil and gas projects.
• Advanced Cost Estimating skills.
• Advanced Microsoft Excel skills.
• Effective communication and presentation skills.

This role is for applicants residing in or willing to relocate to Perth.

Closing date for applications is 23.06.2026.   INPEX reserves the right to close applications early should a suitable pool of candidates be identified. Please note that direct feedback on applications will only be provided to interviewed candidates.

What We Offer: 

Leave & Flexibility:

• 16 weeks of fully paid parental leave.
• Options to purchase additional leave.
• Dedication to flexible work arrangements, encompassing variable hours and remove work options.
• INPEX Foundation Day, discretionary leave, and community volunteering leave.

Remuneration & Financial Benefits:

• Competitive remuneration package with performance‑based incentives.
• Superannuation above the standard guarantee.
• Salary packaging options, including novated leasing.
• Reward and recognition programs, including access to discounts from over 350 retailers.

Career Growth & Development: 

• Clear pathways for career development and internal progression.
• Structured leadership development programs with ongoing support.
• Dedicated study leave and access to learning and development opportunities. 

Wellbeing:

• Access to wellbeing initiatives, including gym membership options and health resources.
• A supportive workplace focused on safety, balance and sustainable work practices.

Additional benefits such as Japanese language classes are available at select locations, including Perth.

We value diversity in our workplace – including beliefs, cultures, and lifestyles, so we can bring our true selves to work every day. If you believe that you have most but not all the requirements outlined above, we encourage you to still apply.

We welcome all candidates to advise us throughout the recruitment process if we can support you with accommodations to make this a more inclusive experience.