Job Description
Are you passionate about making a real impact?
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TLEA is welcoming applications for a full-time Senior Engineer Mechanical to join our team working at our Kwinana plant.
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The successful applicant will be responsible for leading mechanical engineering activities on debottlenecking and brownfield modification projects (PMRs) at TLK's lithium refinery operation plant. This role provides end-to-end technical input across the project lifecycle - from concept development through to construction support - ensuring all mechanical designs are safe, fit-for-purpose, and aligned with plant operability. The position requires strong coordination with internal stakeholders, consultants, and operations teams to deliver efficient, compliant, and constructible engineering solutions.
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In addition to possessing our core values of distinction, pragmatism, honesty, tenacity and innovation, this position will suit an individual with extensive prior experience as a senior mechanical engineer, ideally within Brownfield Environments and Operations.
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Key responsibilities
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Lead mechanical design and technical assessments for assigned debottlenecking PMR projects, including piping, pressure equipment, rotating machinery, and mechanical packages.
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Review and approve mechanical engineering deliverables such as datasheets, equipment specifications, layout drawings, tie-in details, and calculations.
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Ensure all mechanical designs comply with relevant Australian Standards, TLK engineering practices, and operational requirements.
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Coordinate with multi-discipline engineering teams (process, civil, structural, electrical, instrumentation) to ensure integrated design outcomes.
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Support procurement through preparation of technical specifications, evaluation of vendor submissions, and review of vendor documentation.
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Participate in HAZOPs, constructability reviews, and risk assessments to ensure safe and practical implementation of mechanical designs.
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Provide engineering support during construction, commissioning, and handover phases.
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Engage with operations and maintenance teams to ensure mechanical solutions are maintainable and aligned with site strategy.
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What you can bring
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Bachelor's degree in mechanical engineering.
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Minimum 10 years' experience in mechanical engineering roles, including brownfield and project-based work in resource or chemical processing industries.
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Sound understanding of Australian Standards (e.g., AS****, AS****, ASME) and engineering practices relevant to process plants.
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Proven experience in pressure equipment, piping systems, rotating equipment, and layout design.
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Experience reviewing 3D models, mechanical drawings, and design deliverables.
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Strong communication and stakeholder engagement skills.
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Safety-focused mindset with an ability to balance technical integrity and practical constructability.
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We offer
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Contribute to a green and sustainable industry of the future.
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Competitive salary with a performance-based discretionary bonus structure
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Additional Superannuation
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Award and recognition program
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Long service leave option after 5 years (pro rata)
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Supportive colleagues committed to your success and well-being
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Inclusive and diverse work workplace
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TLEA proudly acknowledges and the Whadjuk and Gnaala Karla Boodja people of the Noongar Nation, as the traditional custodians of the Kwinana area, where we operate our plant.
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Kwinana is 38 km from the Perth central business district, 20 km from City of Fremantle and just 7km from Rockingham.
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Applicants are advised that the shortlisting and interview process may commence before the closing date.
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At Tianqi Lithium Energy Australia, we embrace and recognise the value of diversity. We are committed to providing a work environment where everyone is included, treated fairly and with respect. We welcome and encourage applications from people from diverse backgrounds.

📌 Senior Engineer Mechanical (Kwinana Beach)
🏢 Tianqi Lithium Energy Australia
📍 Kwinana Beach