Lachlan Mackenzie

• Provide technical shift support to the TSL furnace and acid plant operators and maintainers during plant commissioning and ramp-up • Furnace charge management including prioritisation of high value materials and development of a metallurgical based SLA with existing operations • Furnace heat-up and ongoing hearth, refractory and taphole wear monitoring using thermo-couples, brick measurements and laser surveys • Propose, execute and report on plant scale metallurgical trials, including effects of coke vs coal, high feed rate, slag chemistry variations • Acid plant technical support including shutdown planning, NOx control, RCAs and variance processes for unplanned downtime • Implementing management of change for process improvement projects including leading 2 HAZOP studies for acid plant improvements • Set-up ongoing monitoring of key process parameters for furnace and acid plant systems including dashboards and event frames using OSIsoft PI systems

• Lead commissioning engineer for TSL furnace sub-systems and assistant commissioning engineer for the wet gas cleaning and acid plants • Cold and hot commissioning with a hands-on approach providing direct leadership and supervision of operations and maintenance activities • Problem solving process, mechanical and electrical commissioning issues to keep ramp-up schedule on track • Management of overseas vendors, contractors and operations support in completing commissioning documentation and performance guarantees • Risk assess all commissioning activities, creating a safe work environment through JSEA’s, isolations and PTW systems • Provide technical support for process and safety incident investigations • Daily and weekly reporting of progress, current issues and schedule risks to site senior management

Electrolysis metallurgist (4 months) Project Metallurgist (2 months) • Day-to-day process analysis, operations support and problem solving for the electrolysis department • Implementation of ‘clean and straight’ cellhouse campaign and improvement projects • Managing process safety risks and operating methodology during 2 planned electrolysis shutdowns • Progressing optimisation projects for pH control and spent acid cooling on a limited capital basis • Monthly metals accounting, byproducts, shipping and consumptions reporting using SAP