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Company description: We are a joint venture between Tianqi Lithium Corporation and IGO Ltd. As pioneers in the Australian lithium industry, we''ve already achieved great things, including building the first battery-grade lithium hydroxide plant in Australia, paving the way for Australia to be a major player in the global transition to a clean energy future. We''re looking for people who want to be a part of the industry of the future - people who work with purpose and urgency, take initiative, and rise to challenges. We''re seeking individuals who empower others, embrace innovation, and want to work in an open and supportive environment, where teamwork and collaboration are valued. At TLEA, you''ll be part of a team that is excited to be involved in a world-class project that benefits not only the Western Australian community but the world. Job description: Are you passionate about making a real impact? TLEA is welcoming applications for a full-time Senior Engineer IT Infrastructure to join our Kwinana team. The Senior Infrastructure Engineer is responsible for the design, build, maintenance, performance, security, and reliability of the organisation''s IT and OT core network and server infrastructure. This role provides expert-level technical leadership across hybrid environments, ensuring systems are secure, resilient, and aligned with best practice and business needs. The position also delivers Level 3 support to the IT Service Desk and acts as a subject matter expert across enterprise systems, integrations, and automation initiatives. In addition to demonstrating our core values of distinction, pragmatism, honesty, tenacity and innovation, this position will suit a seasoned Infrastructure Engineer, whose expertise covers both Network and Hardware Infrastructure implementations and Operational Technology. The ideal candidate will enjoy problem solving and technical learning, is able to plan and set priorities according to operational importance and can manage their time effectively. Profile description: Infrastructure Operations & Support Provide Level 3 support for complex incidents, escalations, and infrastructure-related issues. Triage and resolve infrastructure incidents, ensuring timely updates and knowledge transfer to support teams. Perform after-hours support for high-severity incidents, upgrades, and planned maintenance. Monitor system and network performance. Architecture, Design & Engineering Design, build, and maintain infrastructure architecture across onprem, cloud, network, and OT environments. Maintain and optimise network infrastructure across corporate and OT environments in alignment with ISO 27001 and SecurebyDesign principles. Develop and maintain strategic infrastructure roadmaps for network, hypervisor, and cloud platforms. Establish and maintain infrastructure monitoring, ensuring proactive detection and response to platform, network, and backup events. Systems, Applications & Integration Act as the subject matter expert for business and operational systems across IT and OT domains. Oversee the operation, support, and continuous improvement of core systems including ERP, cloud applications, , MES, and related OT platforms. Design and implement system integrations. Governance, Security & Compliance Manage backup and recovery operations in line with data governance frameworks Oversee infrastructure change management processes, ensuring changes are compliant with ISO 27001. Ensure alignment with IT standards, cybersecurity requirements, and cost controls across all infrastructure and systems initiatives. Maintain accurate asset and configuration inventories (CMDB), ensuring recoverability and lifecycle alignment. What you can bring Core Technical Expertise Strong knowledge of Windows Server operating systems. Experience with Microsoft technologies including Active Directory, SQL Server, Exchange Online, DFS, File & Print Services. Indepth experience with Microsoft 365, Entra ID (Azure AD), and Microsoft Purview. Knowledge of Azure hybrid infrastructure. Virtualisation & Cloud Experience deploying and operating virtualisation platforms including HyperV, VMware, and Dell VxRail. Infrastructure automation experience. Networking & Security Strong experience with the Fortinet ecosystem. Experience with Dell and Cisco switching, VLANs, routing, and coretoedge segmentation. Strong understanding of securebydesign principles and physical/logical segmentation in hybrid IT/OT environments. Solid understanding of physical network infrastructure. Operational Technology (OT) Experience with OT environments including Rockwell FactoryTalk. Understanding of OT cybersecurity, segmentation, and reliability requirements. Scripting & Automation Experience designing and implementing automation to reduce manual processes and improve operational efficiency. Documentation, Governance & Frameworks Strong technical documentation skills across architecture, operations, and procedures. We offer: Contribute to a green and sustainable industry of the future. Competitive salary with a performance-based discretionary bonus structure Additional Superannuation Award and recognition program Long service leave option after 5 years (pro rata) Supportive colleagues committed to your success and well-being Inclusive and diverse work environment