Estimator

Uon Pty Ltd; Perth; On-site; AUD 90,000 - 130,000; Full time

Job summary

UON Energy for Every Future in Malaga, WA is seeking an experienced Estimator to develop detailed tenders for complex mining and infrastructure works, with a focus on electrical, dewatering, and related packages. The successful candidate will bring 7+ years in estimating, strong scope interrogation, and the ability to coordinate with procurement, project teams and clients to finalise tender submissions.

Candidates with civil estimating only should not apply; mining and dewatering experience is

Qualifications

• 7+ years' experience as an estimator on multidisciplinary mining/infrastructure projects.
• Specialised in electrical estimating and dewatering.
• Experience tackling complex scope definitions and tender packages.

Responsibilities

• Prepare and price tenders with take-offs and provisional sums.
• Source subcontractor quotations and align with scope.
• Support procurement and bid governance.
• Manage client queries and tender clarifications.
• Maintain cost records and handover to project team.
• Archive bids and reporting per policies.

Skills

Mining experience

Dewatering projects

Electrical background

Job description

12th October, 2026

UON Energy for Every Future

UON is a Western Australian integrated energy company providing turnkey energy and water solutions to the mining sector and beyond, helping our customers on their decarbonisation journey utilising the technology, skills and real experience of team members across the business.

About the Role

An exciting opportunity has become available for an experienced Estimator to join our team in Malaga, Perth WA.

The ideal applicant will have mining experience outside of civil estimating, demonstrable experience working within dewatering projects and come from an electrical background.

• This role will suit an estimator with 7+ years' experience who is comfortable developing estimates for complex, multidisciplinary projects within the mining and infrastructure sectors.
• We are particularly interested in candidates with an electrical estimating background, although strong experience across mining infrastructure, power generation or dewatering projects will also be highly regarded.

** Candidates with traditional civil estimating background need not apply. **

UON is looking for someone who can understand technical scopes, interrogate project requirements and develop robust estimates across equipment, electrical, mechanical, piping and supporting infrastructure packages.

Your main responsibilities will include:

• Prepare and price tenders — quantity take-offs, first-principles rates, provisional sums/contingency, and final tender price development.
• Ensure all EOI and tender submissions comply with client requirements.
• Source, compare and level subcontractor and supplier quotations to a consistent scope basis.
• Assist procurement/purchasing functions per company procedures, as directed by the Bid Manager.
• Manage client queries and clarifications, distributing responses and tender amendments to the right people.
• Support bid governance — launch meetings, mid‑term and final tender reviews, post‑submittal clarifications, and tender program input.
• Maintain company risk and opportunity compliance, minimising risk exposure under company terms and conditions.
• Track estimate accuracy post‑award — site visits and feedback loops with the projects division to compare estimated vs actual costs, plus structured handover to the project team.
• Maintain cost/profitability records — company unit cost database, job profitability and unit cost analysis.
• General administration — archiving bids, regular reporting, adhering to policies, flagging client relationship issues, and other duties as required.

Only those with the unrestricted right to work in Australia will be considered. UON is an Equal Opportunity Employer, and we strongly support diversity in our workforce.

Applicants from diverse backgrounds and Aboriginal and Torres Strait Islanders, are encouraged to apply.