Organisation

Leadership

Meet the Experts Delivering Your Clean Energy Solutions

Our leadership team combines numerous like-minded thought leaders and specialists from across the clean energy and technology industries. They hail from different regions and work in a variety of sectors and industries. 

Our leaders are recognised experts dedicated to delivering the right solutions for all of your clean energy and technology needs.  

Our leaders are not just leaders – they are your partners in designing customised solutions tailored to your requirements and circumstances. Their unparalleled expertise and commitment to excellence ensure that every project, no matter how complex, is handled with the utmost professionalism and care. 

Group Executive Committee

Our Group Executive Committee is responsible for the day-to-day management of the company and the execution of our strategic initiatives. Key responsibilities include providing strategic leadership, coordinating group-wide functions, and overseeing governance and compliance. This cohesive structure allows us to maintain a clear and efficient operational strategy, ensuring that all our projects align with our core values and objectives. 

Michael Sieg

Group Chief Executive OfficerJoined: 2003Experience: 28 years
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Vivienne Maclachlan

Group Chief Financial OfficerJoined: 2019Experience: 24 years
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Duncan Black

Group Chief Operating OfficerJoined: 2023Experience: 34 years
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Miriam Plater

Group Chief People OfficerJoined: 2018Experience: 35 years
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Find out about our 20-year history and how it led us to where we are today.