Hamish Tyrwhitt is Managing Director and Chief Executive Officer of Leighton Holdings Limited, parent company to the Leighton Group.

The Leighton Group is an international contractor that owns and operates via a diverse range of strong operating brands in Australia, including Thiess, John Holland, Leighton Contractors and Leighton Properties. The Group also operates in more than 20 countries throughout Asia, the Middle East and Africa from headquarters in Australia, Hong Kong and Dubai via Leighton Asia, Leighton Welspun, Leighton Offshore, the Habtoor Leighton Group and Leighton Africa.

The worlds' largest contract miner, Leighton Group companies are leaders in the delivery of construction, mining, and operation and maintenance services to the infrastructure, resources and property markets. Leighton companies directly employ more than 50,000 empowered people. The Group is built on its core values of discipline, integrity, safety and success.

Hamish started his 26-year career with the Leighton Group at John Holland and has subsequently worked for Leighton International, Leighton Contractors and Leighton Asia. He was appointed Managing Director of Leighton Asia in 2007 and, in 2011, was given responsibility for Indian and Offshore operations. He was appointed Managing Director and CEO of Leighton Holdings in August 2011.

Hamish has a Bachelor of Engineering majoring in Civil Engineering from the University of Western Australia. He is a member of Engineers Australia, a Chartered Professional Engineer and a member of The Hong Kong Institution of Engineers.

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