We’ve changed a lot in recent years. We’ve grown to be one of Australia’s clearest voices on where energy’s headed. And how we’ll get there. Our executive team has shown the way. The talented leadership team help guide our 2500 strong workforce. They draw the different strings of our diverse business units into a whole, so we can pull together to deliver our core strategic objective. To light the way to a reliable, cleaner energy future for all. 

Guiding our purpose, principles and values

Catherine Tanna - Managing Director

Catherine Tanna

Catherine joined EnergyAustralia as Managing Director in July 2014.  Prior to joining EA, from 2009 she led the Australia & China businesses of BG Group, an FTSE listed international oil and gas company.  In a decade with Shell, she was Executive Vice President of Gas & Power with responsibility for Shell's LNG, gas transmission and power generation interests across Africa.  She also held similar roles covering North Asia, Russia, North America and Latin America.

Catherine was born in Queensland, raised in Gladstone, and studied at the University of Queensland.

She is a member of the Boards of the Reserve Bank of Australia and of the Business Council of Australia.


Mark Collette - Executive, Energy

Mark Collette

As Executive – Energy, Mark leads the Energy team comprising EnergyAustralia’s generation, energy trading and commercial and industrial sales and account management.  The Energy team make or buy the energy for all of EnergyAustralia’s customers from a portfolio of over 5000 MW (both equity and contract) of coal, gas and renewable generation.  

Mark has been with EnergyAustralia for fifteen years in a variety of roles across the wholesale and retail energy markets including Energy Markets, Corporate Strategy and Development and Sustainability.

Prior to joining EnergyAustralia, Mark worked for management consulting firm LEK consulting on a variety of commercial engagements in Australia, Thailand and the UK. 


Andrew Perry

Andrew Perry

Andrew Perry joined EnergyAustralia as Executive Manager Retail Finance in August 2013 and in this role has had responsibility for financial stewardship of the EnergyAustralia’s Retail business.  

From March 2015 Andrew served as EnergyAustralia’s Chief Financial Officer during a period of transformation for the business that includes the introduction of a new operating model.  In July 2016 Andrew took on leadership of EnergyAustralia's NextGen business.

Prior to joining EnergyAustralia, Andrew held executive roles with Telstra between 2000 and 2011.


Chris Ryan

Chris Ryan

Chris Ryan joined EnergyAustralia in January 2015 as General Counsel and Company Secretary. Chris is a member of the Executive Management team at EnergyAustralia, and is accountable for the Legal & Governance division, which comprises around 30 professionals in the legal, company secretariat and regulatory compliance teams. Previously, Chris was General Counsel for the Shell Australia group of companies in Melbourne. He held a range of legal, managerial and director positions with the Royal Dutch Shell Group in Melbourne, Perth, London, The Hague and Singapore over a 20 year career with Shell. 

Chris is a graduate in Law (Hons) and Commerce from the University of Melbourne, has a Graduate Diploma in Applied Corporate Governance and is a graduate of the Australian Institute of Company Directors’ course.  He began his career in Melbourne with national law firm Blake Dawson Waldron (now Ashurst Australia).


Andrew Fisher


Andrew Fisher

Andrew Fisher joined the TXU business in 2002 from PricewaterhouseCoopers. As part of the Finance team, he had direct involvement in the transactions that saw ownership of the business move from TXU to Singapore Power and then to CLP.  Under CLP ownership further transactions saw the business continue to grow to become EnergyAustralia.

After two years as Head of Tax & Treasury, Andrew served as acting CFO between April 2008 and November 2009.  He also spent five months seconded from Finance in 2014/15 to establish the Corporate team. In July 2015 he was appointed to lead the Commercial team in Corporate and in January 2017 he commenced as Executive - Corporate. 


Alistair McKeown

Alastair McKeown

Alastair McKeown joined EnergyAustralia as Chief Financial Officer on 20 June 2016.
He brings to EnergyAustralia two decades of insight and experience across the energy chain. Prior to joining EnergyAustralia he was Chief Financial Officer of regulated energy utility Victoria Power Networks (CitiPower and Powercor) and before that was a long-serving Finance Director of major business units at Centrica plc, a London-listed supplier of gas and electricity services to customers in the United Kingdom and the United States.



Liz Wescott

Liz Wescott

Liz joined EnergyAustralia as Executive People, covering HR and Health, Safety, Security and Environment in July 2018. Liz has extensive experience leading teams and organisations and has a well-earned reputation for getting the best from the businesses she works with.

Previously, Liz worked for ExxonMobil for twenty-five years in a variety of roles spanning strategic planning, operations, project management, technical, commercial and safety leadership. As a civil engineering and commerce graduate, she has lived and worked in Australia, the UK and Italy.