Mr Scott-Mackenzie was CEO of a construction company in Australia. He has over 40 years' experience in infrastructure, construction and mining services gained in Australia and Africa, as well as experience in financial, legal and commercial aspects of projects. He is the Chairman of the Safety, Health, Environment and Sustainability Committee, member of the Governance Committee, Risk and Compliance Committee and People and Culture Committee.

Ms Stein has over 30 years' experience in Board and senior executive positions in the building materials, oil and gas, energy and utilities, mining and resources, water and waste management sectors. As a former CEO, Emma is well versed in capital investment decisions, risk management frameworks and servicing major industrial customer relationships. Emma has led the implementation of mergers and acquisitions as well as new enterprise wide IT systems and processes. She is Director of: Alumina Limited and Worley Limited. She is Chairman of the Risk and Compliance Committee and a member of the People and Culture Committee and Governance Committee.

Dr Guthrie has experience in the mining and resources industry. In addition to her former role as a CEO, Vanessa has led a number of strategic functions in operations as well as sustainability and stakeholder engagement. Vanessa also brings technical knowledge to the role. She is Director at: Santos Limited, Tronox Holdings PLC, Lynas Rare Earths Ltd and Australian Broadcasting Corporation. She is Chair of the People and Culture Committee and Governance Committee and a member of the Safety, Health, Environment and Sustainability Committee.

Mr Barro has over 25 years' experience in the premixed concrete and construction materials industry. In addition to his industry insights he brings leadership and financial experience and to the role. He is Managing Director of Barro Group Pty Ltd. He is member of the Safety, Health, Environment and Sustainability Committee.

Mr Tarrant has experience in the finance industry across Australia, the United Kingdom and Asia. Geoff has particular expertise in mergers and acquisitions and capital markets. As the Executive Chairman of a construction software company, Geoff also brings IT and technology experience to the role. He is Chairman of Zuuse Limited. He is a member of the Risk and Compliance Committee.

Mr Wright is an experienced director and executive having held leadership positions over a career at mining services and multinational contracting businesses covering multiple sectors and disciplines including mining, civil and general engineering, construction, environmental services and utility operations. He is currently Executive Chairman of Thiess and was formerly Chief Executive Officer of ASX listed CIMIC Group Limited. Mr Wright is currently a Director of the Minerals Council of Australia, serving as Co-Chair of its Safety and Sustainability Committee and Chair of its Safety & Health Subcommittee.

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Ms Barro has over 40 years' experience in the construction materials industry and executive management in line and functional areas. Rhonda has experience and insights in customer and stakeholder relations. Rhonda has held numerous leadership roles in community organisations and is a Fellow of the Williamson Leadership Program. She is Executive Director of Barro Group and Director of Independent Cement and Lime Pty Ltd and St Vincent's Institute of Medical Research Foundation Board. She is member of the People and Culture Committee.

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