Estimator (naval base)

About the Company

Ahrens is a fifth-generation, Australian family-owned company, with over 120 years' experience in delivering a wide range of high-quality and cost-effective products and projects across Australia, with footprints overseas.

As we continue to evolve, so does our need to heavily invest in our people and facilities for continued success.

With 450 employees across our WA divisions and close to 2,000 nationally, we are united by a positive and supportive team culture, a commitment to look after each other, be the best we can and represent a diverse range of backgrounds and skills. In return, we reward those who passionately work with us towards our vision.

About the Role

We have an exciting opportunity for an experienced Estimator to join our fabrication team in Kwinana. This is a hands‐on, commercially focused role at the heart of our project pipeline — you'll be the person who turns complex scopes and drawings into accurate, competitive bids that protect margin and set projects up for success.

You'll work closely with our workshop, QA/QC, and procurement teams, and will own the estimating process end‐to‐end: from first receiving a set of drawings through to handover of awarded work to the delivery team.

Key Accountabilities

• Prepare estimates, quotes, and tenders from drawings, specifications, and RFQs
• Complete detailed take‐offs and labour build‐ups across fabrication, welding, machining, assembly, coatings, and testing
• Price complex scopes including heat exchangers, pressure vessels, piping spools, and SMP items
• Obtain and assess supplier and subcontract pricing — materials, NDT, heat treatment, coatings, and transport
• Ensure pricing accounts for QA/QC, ITPs, MDRs, testing, and compliance requirements
• Identify technical and commercial risks, particularly around code compliance, materials, tolerances, and rework exposure
• Provide thorough handover of awarded work, including key assumptions, risks, and cost drivers

Essential Criteria

• Proven estimating experience in pressure equipment, piping, or heavy fabrication
• Strong ability to interpret complex engineering drawings and specifications
• Solid understanding of fabrication processes, welding, and material behaviour (carbon and exotic alloys)
• Solid commercial awareness — you understand risk, margin, and what makes a bid win or lose
• Ability to price QA/QC, NDT, testing, and documentation requirements accurately
• Proficient in Excel and estimating systems

Desirable Criteria

• Trade or engineering background (fitter/boilermaker, mechanical engineer, or similar)
• Experience with ASME, AS1210, or other pressure vessel and piping codes
• Experience in mining, oil & gas, or chemical processing industries

Why Work at Ahrens

• Employee Assistance Program, supporting you and your family's health & wellbeing
• Discounts to some of Australia's leading corporate partners in private health insurance, gyms, travel, clothing, vehicles and more
• Generous paid parental leave entitlements to support you and your family
• Annual Employee Donation Scheme to support a charity/cause of your choice
• Family, social and team building events
• Opportunities for career progression