Mineral Resources is a leading diversified resources company with extensive operations in lithium, iron ore, energy and mining services across Western Australia. With a focus on people and innovation, MinRes has become one of the ASX’s best-performing companies since listing in 2006.

About The Role

The Principal Mechanical Engineer is responsible for leading the Mechanical Engineering team to provide engineering expertise in the design, equipment selection, fabrication, installation, assembly and day-to-day management of the projects. The role includes the stewardship and development of technical standards, specifications and relevant systems to uphold technical integrity across delivery.

In this position you’ll:

- Review and plan projects with the Engineering Manager to ensure technical aspects of each job are clear.
- Ensure technical equipment selection is in line with the Process Design Criteria.
- Be a focal point for the management of operating site change management.
- Undertake completion and review of Process Flow Diagrams and Piping & Instrument diagrams.
- Prepare project design documentation.
- Facilitate safety in design reviews/workshops, ensuring cross‑discipline participation and follow up through close out.
- Be a focal point for all technical‑based queries from the client or associated suppliers.
- Liaise with both in‑house and external designers and detailers as required for the successful completion of each project.
- Assist with purchasing of materials for projects by assessing quantities and completing Purchase Orders.
- Ensure further development and revision of relevant discipline standard drawings, specifications, procedures and various deliverable templates.
- Ability to take ownership of work from initiation to execution.

Necessary skills and qualifications





- Tertiary Qualifications in Mechanical Engineering.
- 10+ years’ industry experience.
- 5+ years in a Senior Engineering role.
- Mining related industry experience working on large construction projects from design to commissioning.
- Prior experience in modelling and drafting.
- Experience with materials handling is essential, and you can accurately calculate all crushing, screening and conveying components based on design criteria.
- Experience with pumps and piping is essential to accurately size and select suitable pumps and pipe sizing based on mass balance and other process design criteria.
- Bulk materials storage and handling facilities design include gravity reclaim stockpiles, mass & funnel flow ore bins and feeders.
- Experience in using Helix or Sidewinder conveyor design software.
- Strong level of computer literacy (operating systems, Office products, engineering tools).
- Skilled with Fluid Flow 3 hydraulic simulation software, including homogenous, heterogenous and non‑Newtonian fluids.
- Development and interpretation of material handling test work reports by TUNRA or Jenike & Johanson.
- Ability to conduct cost/time analysis of vendor equipment and supply options.
- Ability to take ownership of work from initiation to execution.

What We Offer

Our headquarters at 20 Walters Drive, Osborne Park, sets a recent standard for workplace wellness. World‑class facilities include a café, restaurant, commercial gym, crèche, daycare and health centre including a GP.

- Competitive salary
- Annual bonus
- Access to "MyShare" MinRes Share Plan
- Employee discounts and offers
- Physical and mental health programmes
- Salary packaging

Mineral Resources Limited is a proud Equal Opportunity Employer, and we encourage applicants who identify as Aboriginal or Torres Strait Islander to apply.

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📌 Principal Mechanical Engineer (City of Stirling)
🏢 Mineral Resources
📍 City of Stirling