Our Board is appointed by Unitywater’s three shareholders: the Noosa, Sunshine Coast and Moreton Bay Regional Councils.

The independent skills-based Board guides our Executive Leadership Team to fulfil its vision to create a sustainable, industry-leading, community and customer oriented water and allied services business.

The combination of Board members' qualifications, skills and experience ensures a strong commercial focus, with emphasis on identifying efficiencies across the organisation and passing on costs savings to you.

Michael Arnett, Chairman

B Comm, LLB

Michael has significant experience in the corporate, commercial, mining and natural resources (including water), banking, finance and securities sectors. He was a previously a Board member of Unitywater (from 2009 to 2012) and of Seqwater (from 2012 to 2019). Michael is a Board member of, amongst others, NRW Holdings Limited, Queensland Energy Resources Limited.

Mike Williamson


Mike brings to Unitywater more than 30 years’ experience in the fields of water and sewage management, waste minimisation, resource recovery, engineering and project management. He has held positions as Managing Director of CH2M Australia and as Managing Partner of global consulting firm Environmental Resources Management (ERM). From 2001 until 2015 he was Chairman of the Oil Stewardship Advisory Council and he has held Board positions with Keep Australia Beautiful and Special Olympics NSW. Mike is also non-executive Chair of ECOllaboration Ltd, a not-for-profit company, based on the Sunshine Coast, providing ecological and environmental services and environmental education. Mike is a qualified marine and mechanical engineer and is a Fellow of the Australian Institute of Company Directors. 

Fiona Waterhouse

B Mfg Mgt, Dip Env Studies, Cert Business, GAICD

Fiona is CEO of bioenergy developer Utilitas, one of the pioneers of the emerging industrial bio-products market in Australia. A production engineer by trade, Fiona has owned and advised industrial and technology-related business for the past 20 years.

The Business Sustainability Roadmap that she developed as part of her role in the Queensland Environment Department between 2000 and 2003 was recognised as a sustainable development milestone for Queensland.

Sarah Zeljko


Sarah brings to Unitywater almost 20 years' of extensive executive, operational, governance and advisory experience. She is a Non-Executive Director of Powerlink and Energy Super, and holds several advisory roles. Sarah has worked across a range of large ASX-listed, government and private corporations, and led a number of Boards, Committees and Executives through strategic and operational challenges.

Megan Houghton

B Comm, BA (Econ), GAICD

Megan has more than 11 years’ experience in non-executive director roles on public and private company boards, as well as 24 years’ experience in CEO, senior executive and management consultant roles. Megan has a strong commercial approach and has worked for listed companies, publicly-owned corporations, government and professional service firms across a range of industries including utilities, property, tourism, major events, and sustainability.