ABOUT

Michael Harding

Chairman, Independent Non-Executive Director

Mike has been Chairman of Horizon since November 2018. He has held management positions around the world with British Petroleum (BP), including President and General Manager of BP Exploration Australia. Mike is a former Director of Cleanaway Waste Management Limited, former Chairman of Downer and Lynas Limited, Roc Oil Company Limited, Clough Limited and ARC Energy Limited and a former Director of Santos Limited.

Mike holds a Master in Science, majoring in Mechanical Engineering.

Board Committees – Mike is Chairman of Horizon’s Disclosure Committee and Member of Horizon’s Audit and Remuneration and Nomination Committees.

Nigel Burgess

Non-Executive Director

Nigel was appointed as Non-Executive Director on 1 July 2021. He is a nominee director of Samuel Terry Asset Management, which manages the Samuel Terry Absolute Return Fund, a substantial shareholder in Horizon. Due to his association with Samuel Terry, he is not considered independent.

Nigel has 30 years of commercial experience in funds management with Samuel Terry, Hunter Hall, GIO of Australia, Friends Provident in Australia, and a family office in Europe. He has experience in a variety of commercial transactions and corporate restructurings across a range of industries and jurisdictions.

He is a former director of Spicers Limited (ASX: SRS; de-listed 2019) and Yellow Holdings Limited (New Zealand).

Nigel holds a Bachelor of Economics degree and Masters Accounting degree from the University of New South Wales.

Board Committee – Nigel is a Member of Horizon’s Audit Committee.

Bruce Clement

Chairman and Independent Non-Executive Director

Bruce was appointed as Chairman and Independent Non-Executive Director on 20 November 2024 after the retirement of Mike Harding at our 2024 Annual General Meeting.

Bruce has over 40 years’ oil and gas experience; beginning his career as a projects engineer at Esso Australia Limited (now Exxon). He has managed exploration, development and production operations in Australia and Asia, as well as successfully delivering key projects in Australia, China, Indonesia, the UK and the USA, including implementation of major acquisitions and divestments.

Bruce is the Executive Director and Interim Chief Executive Officer of Beach Energy Limited (ASX:BPT). Bruce is Chairman of Cue Energy Resources Limited.

He is a former director of Norwest Energy Limited.

Bruce has led AWE Limited and ROC Oil Limited and held senior managerial roles at Santos Limited, Ampolex Limited and Esso Limited (Exxon).

Bruce holds a Bachelor of Engineering (Civil) Hons and Bachelor of Science (Maths & Computer Science) from Sydney Uni and Masters of Business Administration.

Board Committee – Bruce is a member of Horizon’s Audit, Remuneration and Nomination and Disclosure Committees.

Greg Bittar

Non-Executive Director

Greg has been a Director of Horizon since March 2017, as nominated by Horizon’s substantial shareholder IMC Pan Asia Alliance Group. Greg has extensive experience in public and private markets mergers and acquisitions, capital markets and strategic advisory assignments across a range of sectors including general industrials, metals and mining, mining services and energy. Greg has worked for Bankers Trust, Baring Brothers Burrows and Morgan Stanley.

Greg is currently Chairman of Brightstar Resources Limited and was former Chairman of Trek Metals Limited and Millennium Minerals Limited.

Greg holds a Masters in Finance from London Business School, a Bachelor of Economics and a Bachelor of Laws (Hons).

Board Committees – Greg is Chairman of Horizon’s Remuneration and Nomination Committee and a Member of Horizon’s Audit Committee.

Sandra Birkensleigh

Independent Non-Executive Director

Sandra has been a Director of Horizon since February 2016. Sandra has 24 years’ experience in financial services, risk management, compliance and corporate governance with PricewaterhouseCoopers including as Global Lead for Governance Risk & Compliance, National Lead for Partner Risk and Controls Solutions and a Service Team Leader for Performance Improvement. Sandra has been a professional non-executive director at a range of entities for the past 11 years.

Sandra is Chairman of Auswide Bank Limited, Non-Executive Director of 7-11 Holdings and its subsidiaries, National Disability Insurance Agency, and Adore Beauty Limited, Deputy Chancellor and a Council Member of the University of the Sunshine Coast and Chair of its Audit and Risk Committee. She is an Independent Member of the Audit Committee of the Reserve Bank of Australia and Chair of the Tasmania Finance Corporation.

Sandra is a former director of MLC Limited.

Sandra is a Chartered Accountant and holds a Bachelor of Commerce. She is a Graduate Member of the Australian Institute of Company Directors and Fellow of the Governance, Risk and Compliance Institute.

Board Committees – Sandra is Chair of Horizon’s Audit Committee and a Member of Horizon’s Risk Management, and Remuneration and Nomination Committees.

Richard Beament

Managing Director, Chief Executive Officer

Richard has been Managing Director and Chief Executive Officer of Horizon since July 2022.

He was formerly Horizon’s CFO from July 2018 to June 2022 and was Company Secretary from September 2021 to June 2022. He joined Horizon as Finance and Commercial Manager in May 2010. Since that time, he has been actively engaged in arranging and managing the Group’s funding, as well as managing the Group’s investments in Maari and Block 22/12.

Richard is a Chartered Accountant with over 25 years’ experience in accounting and finance across a range of sectors, including 13 years in managerial positions in the oil and gas sector.

Prior to joining Horizon in 2010, he held senior positions in PricewaterhouseCoopers in Sydney and London.

Richard holds a Bachelor of Commerce degree and is a member of the Chartered Accountants Australia and New Zealand (CAANZ).

Board Committees – Richard is a Member of Horizon’s Risk Management and Disclosure Committees and is a Non Executive Director of Cue Energy Resources Limited from July 2026.

Kyle Keen

CFO / Assistant Company Secretary

Kyle has been Horizon’s Group Financial Controller until his appointment as Chief Financial Officer on 1 July 2022. Kyle has been Horizon’s Assistant Company Secretary since November 2018. Kyle is a Non Executive Director of Cue Energy Resources Limited from July 2026.

Kyle is a Chartered Accountant with expertise in financial risk management and reporting across a range of sectors, in particular, oil and gas. He has 12 years’ experience including working in top tier accounting practices including EY in the United Kingdom and KPMG in South Africa.

Kyle holds a Bachelor of Accounting (Hons) degree and is a member of the South African Institute of Chartered Accountants.

Gavin Douglas

Chief Operating Officer

Gavin has been Horizon’s Group General Manager – Production & Exploration until his appointment as Chief Operating Officer in July 2022. Gavin is a Non Executive Director of Cue Energy Resources Limited from July 2026.

Gavin is a geologist with over 25 years of exploration, development and production oil and gas experience, and over a decade in technical managerial positions, with extensive experience leading multidiscipline subsurface teams in Australia, SE Asia and the Middle East. Prior to joining Horizon, Gavin was the Well Delivery Manager with Oil Search and Subsurface Manager with Eaglewood Energy.

Gavin holds an Honours Degree in Geology and a Masters in Reservoir Evaluation & Management. He is a member of the American Association of Petroleum Geologists (AAPG) and a member of the Society of Petroleum Engineers (SPE).

Vasilios (Vas) Margiankakos

Company Secretary / Group Tax Manager

Vas has been Horizon’s Group Tax Manager since October 2017. Vas has over 20 years’ experience in corporate and international taxation and mergers and acquisitions across a vast number of industries including oil and gas, banking and financial services, infrastructure, media, manufacturing and consumer goods, and technology. Prior to joining Horizon, Vas was Head of Tax at Bravura Solutions Limited and BBC Worldwide Australia (now BBC Studios), prior to which he held a number of senior tax positions at top tier accounting practices such as EY, Deloitte and KPMG.

Vas holds a Bachelor of Economics degree from the University of New South Wales.

Hany Sadek

GM, Projects & Engineering

Hany has been Horizon’s GM for Projects and Engineering since July 2022. He joined Horizon in 2014, leading greenfield development planning projects. Hany leads Horizon’s technical team engagement with operators and JV partners on HSE, operations and projects performance matters.

Hany brings to Horizon more than 30 years’ experience in the oil and gas industry, spanning field development planning, project management, production optimisation and process design.

Prior to Horizon, Hany held Engineering and Projects Director positions at Weatherford Oil Tools Middle East and was co-founder of Siwa Petroleum, specialising in the delivery of early production facilities.

Hany holds an Honours Degree in Chemical Engineering.

Dr Peter Allan Goode

Independent Non-Executive Director

Dr Goode was appointed as Independent Non-Executive Director on 12 September 2024.

Dr Goode has more than 40 years of experience in engineering, manufacturing and oilfield and industrial services. He is currently Chairman and co-founder of the leading US onshore completions provider, GR Energy Services. He also co-founded and built Global Oilfield Services, a leadership US ESP company, which was sold to Halliburton in November 2011. His other professional roles include a number of management positions with Schlumberger between 1985 and 2003 in the US, Indonesia and the UK. These global roles included direct responsibility for the associated research, engineering and manufacturing activities. He also has extensive public company experience having been the Managing Director and CEO of Transfield Services between 2009 and 2013, a leading industrial services provider listed on the Australian Stock Exchange. Dr Goode also served as President and CEO of Vetco International Ltd, an international oilfield services company with revenue of approximately $3 billion per year and with operations in 34 countries. Early in his career he held various reservoir engineering positions at Santos in Australia and SOHIO Petroleum.

Dr Goode holds a Bachelor of Science in Mathematics from University of Adelaide, and holds a PhD in Petroleum Engineering from Herriot-Watt University, Scotland.

Board Committee – Peter is Chairman of Horizon’s Risk Management and Remuneration & Nomination Committees.

Catherine Costello

Independent Non-Executive Director

Ms Costello brings more than 25 years of experience in Australian and multinational businesses in the resources industry, including large ASX-listed and US-listed entities, holding key executive roles responsible for financial management and governance. She has been closely involved in strategic decision making and transformative business and organisational capital structuring processes, leading many corporate transactions. Her board experience includes executive director roles and providing independent advisory services while chairing board committees..

Ms Costello is a graduate of both the Australian Institute of Company Directors and the Governance Institute of Australia. She has a Bachelor of Commerce from the University of Queensland, a Masters of Science from Curtin University, and is a Chartered Accountant, and Chartered Secretary.

Board Committee – Catherine is chairman of the Audit Committee and a member of the Risk Management Committee.

Horizon Head Office

For all share related enquiries please visit the Computershare website.

To stay up to date with our latest ASX announcements, media releases and other news.

Our People

Board of Directors

Bruce Clement

Chairman, Independent Non-Executive Director

Richard Beament

Managing Director, Chief Executive Officer

Catherine Costello

Independent Non-Executive Director

Dr Peter Allan Goode

Independent Non-Executive Director