Our leadership team

The team guiding our way

Frank Calabria

Frank Calabria

Chief Executive Officer & Managing Director

Frank Calabria was appointed Chief Executive Officer and Managing Director of the Company in October 2016.  Frank is a member of the Company’s Health, Safety and Environment Committee.

Frank first joined Origin as Chief Financial Officer in November 2001 and was appointed Chief Executive Officer Energy Markets in March 2009. In that latter role, Frank was responsible for the integrated business within Australia including retailing and trading of natural gas, electricity and LPG, power generation and the solar and emerging business.

Frank is a Director of the Australian Energy Council and the Australian Petroleum Production & Exploration Association.  He is a former Chairman of Australian Energy Council and former Director of the Australian Energy Market Operator.

Prior to joining Origin, Frank held roles with Pioneer International Ltd, Hanson plc and Hutchison Telecommunications.

Frank has a Bachelor of Economics from Macquarie University and a Master of Business Administration (Executive) from the Australian Graduate School of Management.

Frank is also a Fellow of Chartered Accountants Australia and New Zealand and a Fellow of the Financial Services Institute of Australasia.

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Jon Briskin

Executive General Manager, Retail

Jon Briskin joined Origin in 2010 and was appointed General Manager, Retail in May 2016. 

Jon leads the teams responsible for energy sales, marketing, product development and service experience for Origin’s residential and SME customers.

Jon has held various roles at Origin leading customer operations, service transformation and customer experience.

Prior to Origin Jon worked as a management consultant across financial services, energy, technology and government sectors.  Jon holds a Bachelor of Commerce (Accounting and Finance) from Monash University.

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Greg Jarvis

Executive General Manager, Energy Supply and Operations

Greg Jarvis joined Origin in 2002 as Electricity Trading Manager and was appointed General Manager, Wholesale, Trading and Business Sales in February 2011.

Greg is responsible for Wholesale, Trading, Business Energy, Solar, Generation and LPG.

Holding 19 years experience in the financial market industry, with 14 years experience in energy markets, Greg began his career in the banking industry in Australia before moving overseas to work. He has a Masters in Applied Finance and a Bachelor of Business. 


Kate Jordan

General Counsel & Executive General Manager, Company Secretariat, Risk & Governance

Kate Jordan joined Origin in March 2020 and was appointed General Counsel and Executive General Manager.

Kate leads the Legal, Company Secretariat, Risk and Internal Audit teams.

Kate brings a wealth of experience to Origin as an experienced lawyer and leader, most recently as Deputy Chief Executive Partner, with responsibility for People and Development, at Clayton Utz.

Kate has over 20 years' experience and has maintained a strong transaction practice, particularly in relation to M&A.  She has experience across a range of strategic M&A and corporate transactions particularly financial services and telecommunications, media and technology sectors.

Andrew Clarke Group General Counsel and Company Secretary

Tony Lucas

Executive General Manager, Future Energy and Business Development

Tony Lucas joined Origin as Risk Analysis Manager in 2002 and was appointed as General Manager, Energy Risk Management in February 2011.

Tony leads the team responsible for Strategy and Risk for Energy Markets. He will also ensure that Origin is uniquely positioned to lead the transition into a low carbon, technology-enabled world where customers are empowered with greater choice by investing in, incubating and deploying the best future energy solutions.

Originally from New Zealand, Tony began his career in the banking industry before moving to London where he worked for Lehman Brothers. He moved to Australia in 1997 and worked with Bankers Trust and Integral Energy. Tony has an NZ Diploma in Business Studies and Master of Applied Finance.

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Sharon Ridgway

Executive General Manager, People and Culture

Sharon Ridgway joined Origin in 2009 and is responsible for People and Culture. Sharon was appointed in 2012 as the Head of P&C for the LNG business unit before being appointed as the General Manager P&C for Energy Markets in 2015. 

Sharon's team provide strategic support to the business in key areas such as engagement, diversity, talent management, communications and culture change.

Originally from the UK, Sharon spent most of her early career with the Dixons Group, a large European electrical retailer. There she held a number of operational roles before being appointed as the Head of HR and subsequently the Head of European Recruitment. Sharon holds a Bachelor of Business Administration and a Postgraduate Diploma in HR Management.

David Baldwin Chief Executive Officer LNG

Mark Schubert

Executive General Manager, Integrated Gas

Mark joined Origin in April 2015 and was appointed Executive General Manager, IG, in April, 2017. He is responsible for Origin’s Integrated Gas business, which manages the Company’s portfolio of natural gas and LNG interests across Australia, New Zealand and internationally. Integrated Gas includes Origin's interests in Australia Pacific LNG, as operator of the upstream and pipeline components of the joint venture and as gas marketing agent. Mark’s prior Origin role was General Manager, Commercial where he was responsible for strategy, business performance, exploration and new resources, gas marketing, LNG portfolio management, joint ventures and our non-operated interests.

Mark also held a number of senior positions during his 18 year career with Shell. Most recently Mark served as General Manager Production where he had direct accountability for developing Prelude FLNG - the world's first floating LNG facility. Mark’s other roles in Shell included General Manager Geelong Refinery and General Manager Oceania Supply & Marine. Mark holds a Masters of Finance and Financial Law from the University of London and a Bachelor of Engineering (Chemical) from the University of Sydney.

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Samantha Stevens

Executive General Manager, Corporate Affairs

Samantha Stevens joined Origin in March 2018 as Executive General Manager, Corporate Affairs.

Samantha is responsible for Origin’s external affairs, government relations, employee communication functions and the Origin Energy Foundation. 

Samantha has more than 20 years’ experience in corporate affairs, mainly in the resources, industrials and financial services sectors.  Prior to joining Origin, Samantha headed up Corporate Affairs for the global mining services company, Orica, and previously led the global media function and all Corporate Affairs M&A activity at global mining house, BHP.

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Lawrie Tremaine

Chief Financial Officer

Lawrie Tremaine joined Origin in June 2017 and holds the position of Chief Financial Officer.

Lawrie leads the teams responsible for all finance activities, corporate strategy, corporate development, procurement, investor relations, HSE and Risk.

Lawrie has over 30 years’ experience in financial leadership, predominantly in the resource, oil and gas and minerals processing industries. 

Prior to joining Origin Lawrie held a number of senior positions during his 10 years at Woodside Petroleum including Chief Financial Officer for over 6 years. Prior to joining Woodside Lawrie worked at Alcoa for 17 years culminating in 5 years in Tokyo and Beijing as Vice President Finance, Alcoa Asia Pacific. 

Lawrie has extensive experience in capital markets, managing corporate finances and leading change. 

Lawrie has a Bachelor of Business from Chisholm Institute (now Monash University) and is a Fellow of CPA Australia.