Our leadership

Mr Gallagher joined Santos as Managing Director and Chief Executive Officer on 1 February 2016, bringing more than 25 years’ international experience in the oil and gas industry.

Since joining Santos, Mr Gallagher has led significant transformation and growth of the company, delivering a competitive advantage in the energy transition. Under his leadership, Santos is now Australia’s second-largest independent natural gas and liquids producer after implementing a focused strategy to build and grow around five core long-life, producing natural gas assets in Australia, Papua New Guinea and Timor-Leste. The strategy has included successful acquisitions of Quadrant Energy and ConocoPhillips’ Australia-West business, and a merger with Oil Search.

Mr Gallagher has implemented a disciplined low-cost operating model and strengthened the balance sheet to support the company’s strategy, creating a strong cash-generative business that has delivered a series of record results. This has propelled Santos into the top-20 ASX list and the top 20 companies in the oil and gas sector globally.

Mr Gallagher has positioned Santos to leverage the critical role natural gas will play in delivering energy security through the energy transition to net-zero emissions. He has implemented a clear decarbonisation strategy building around the company’s existing infrastructure by developing natural gas projects for backfill and growing new revenue streams and reducing emissions through carbon capture and storage, and low carbon fuels projects such as hydrogen. Under Mr Gallagher’s leadership, Santos has made the world’s first booking of carbon storage reserves and taken a final investment decision on one of the world’s biggest CCS projects in South Australia’s Cooper Basin.

Commencing his career in the oil and gas industry as a drilling engineer in Scotland working with Mobil in the North Sea, Mr Gallagher migrated to Australia to join Woodside in 1998. He was Chief Executive Officer at Clough Limited from 2011 until his appointment at Santos.

Having built a strong, low-cost base business supplying natural gas to meet ongoing customer demand and laid out a clear action plan to develop lower carbon energy and low carbon fuels with an ambitious target of net-zero Scope 1 and 2 emissions by 2040, Mr Gallagher is committed to ensuring Santos remains resilient, value accretive and at the leading edge of the energy transition.

Michael joined Santos in July 2023 and is Executive Vice President Legal, Risk and Governance. In this role Michael is responsible for overseeing the Company’s Legal, Government Relations, Risk, Audit and Compliance, Cultural Heritage and Land Access functions. He previously held the role of Group Legal Counsel and Senior Vice President External Affairs.

Michael has over 30 years’ experience as a lawyer, and 17 years in various corporate roles with responsibilities including legal, internal audit, risk, governance, external affairs security and properties. He has held leadership roles at Woodside and Ampol and prior to that was a salaried partner at Baker & McKenzie in Hong Kong.

Michael has served on the Board of APPEA.

Michael has Bachelor of Laws, Bachelor of Arts and Master of Business Administration degrees from the University of Western Australia.

Brett joined Santos in December 2018. Mr Darley previously led the Upstream Gas and Liquids Division as President.

He has over 30 years of experience in the upstream oil and gas industry, both in Australia and overseas, with technical, operational, commercial and management experience across varied assets, onshore and offshore. Before moving to Santos, Brett held senior leadership roles including Chief Executive Officer of Quadrant Energy, Managing Director and Region Vice President for Apache Energy Limited, Vice President of Drilling and Completions at Woodside and Drilling Manager at Santos.

Brett holds a Bachelor of Civil Engineering degree from the University of Queensland and is a Chartered Engineer.

Bruce joined Santos in December 2021 as part of the company’s merger with Oil Search. Mr Dingeman had been working in Oil Search’s Alaska Business Unit since 2018 where he served first as COO before assuming his current role.

Bruce joined Santos with more than 35 years of global oil and gas industry experience.

Bruce began his career in Alaska, and since that time has held a wide range of technical, financial, and executive leadership roles covering a number of international and domestic locations at ConocoPhillips, Talisman, CASA Exploration, Naftogaz, and Oil Search.

Bruce holds a bachelor’s degree in Petroleum Engineering from the University of Wyoming and a Master of Business Administration from Duke University, where he was named a Fuqua scholar.  He is an active member of the Society of Petroleum Engineers and is a registered Professional Engineer in Texas.

Sherry joined Santos in October 2024, as Chief Financial Officer.

With more than 28 years’ experience, primarily in the oil and gas industry, Sherry has held senior finance, commercial, and merger and acquisition roles in Australia, the United States, Europe and the Middle East.

Most recently, Sherry was interim Chief Executive Officer at Newcrest Limited where she worked closely with Management and the Board to successfully negotiate and complete the sale of the company to Newmont.

Sherry has previously served as Chief Financial Officer at Woodside Energy for four years until early 2022, prior to which she had a 13-year career with Shell, holding varied international finance roles of increasing scope and accountability. She commenced her career with Exxon Mobil.

Sherry holds a Bachelor of Science in Accounting from Louisiana State University and an International Master of Business Administration from the University of South Carolina. She is also a Certified Public Accountant.

Rebecca joined Santos in 2021 and was appointed Executive Vice President Subsurface and Portfolio Management in March 2024. Her previous roles at Santos include Deputy Executive Vice President, Upstream Gas and Liquids and Vice President Subsurface.

Rebecca has over 30 years’ international upstream experience having held technical leadership roles at a number of independent oil and gas companies globally, including Mobil, Woodside, Enterprise Oil, Maersk and Apache.  Latterly she was involved in large scale Upstream transaction and strategy in her role as Global Director Upstream Deals with PwC in London where she worked closely with the upstream and investment community on upstream transactions, portfolio optimisation and the role of subsurface risk in investment decisions.

A member of the Society of Petroleum Engineers, Rebecca is also a Fellow of the Geological Society of London.

Kim joined Santos in January 2023, as Executive Vice President, People and Culture. Kim is responsible for delivering the People strategy at Santos, as well as providing leadership support to internal communications and branding.

Kim has more than 20 years’ experience in a number of senior executive roles across Australia and internationally. She has worked in many diverse industries, including fast moving consumer goods (FMCG), building products, pulp, paper and packaging, hospitality, tourism and gaming, in both large private and ASX listed companies.

Most recently, Kim held senior executive roles as Chief People and Performance Officer, Transformation and Chief of Staff at The Star Entertainment Group.

Kim has previously served as non-executive director for Not for profit, Women in Gaming and Hospitality and is an accredited Gallup Global Strengths Coach. She has a Bachelor of Science (Biological) degree from Latrobe University.

Anthony joined Santos in 2016 and was appointed Chief Commercial Officer in January 2022, with responsibility for the commercial function as well as business development, marketing and trading, strategy and procurement. Anthony previously held the role of Chief Financial Officer, with responsibility for the finance, tax, treasury, planning, business development, commercial, investor relations and IT functions. He brings over 30 years of experience in chartered accounting, banking and corporate financial roles including over 20 years’ experience in the upstream and downstream oil and gas industry.

Prior to joining Santos, Anthony was CEO of Roc Oil Company Ltd (ROC), which was acquired in 2014 by Hong Kong-listed investor Fosun International Limited. Previously, Anthony was Chief Financial Officer of ROC (ASX listed) and has held commercial, finance and business services roles at Caltex Australia, Credit Suisse First Boston (London) and Arthur Andersen (Sydney).

Anthony holds a Masters of Business Administration from AGSM and is a Fellow of the Financial Services Institute of Australasia and a Fellow of Chartered Accountants Australia and New Zealand.

Sean joined Santos in September 2020 as Vice President Marketing Trading Shipping, and was appointed Executive Vice President Marketing Trading and Shipping in February 2025.

He has more than 30 years’ experience in the utilities and resources sectors, the majority of which has been in the oil and gas sector where Sean has held senior roles in commercial, finance and operations.

Sean commenced his career in operations and maintenance, before moving into commercial and M&A roles with Alcoa and Woodside. Upon leaving Woodside, Sean joined JERA where he worked as General Manager Commercial with a focus on M&A, operations and commercial agreements, before joining Santos.

Sean holds a Bachelor of Commerce in Accounting and Finance, a Bachelor of Science in Process Control, a Master of Business Administration and a Master of Human Resource Management. He is a member of CPA Australia and previously a member of the Institute of Arbitrators in London.

Vince rejoined Santos in September 2023 as Executive Vice President Western Australia, Northern Australia and Timor-Leste, after being engaged in various management and technical consulting assignments as well as a Board Non-executive Director. Prior to that Vince spent over four years at Santos as Chief Developments and Operations Officer, where he was responsible for supporting the business during the turnaround and for the profit and loss of all operating assets.

Through his career Vince has also held technical and leadership roles at Esso Australia, Beach Energy and Woodside Energy. He was at Woodside for over 16 years and his last senior executive role prior to leaving was Chief Operations Officer where he was responsible for all their operating assets.

Vince is one of Australia’s most experienced and respected oil and gas operational executives with a strong track record in onshore and offshore process safety and asset integrity. He is also well known for his deep organisational and cultural change capability and has a proven track record for leading teams in a disciplined operating model to deliver reliable and safe operations.

Alan joined Santos in August 2023 as Executive Vice President, Santos Energy Solutions. He is accountable for Santos Energy Solutions global portfolio management and strategy.

Alan has more than 20 years’ experience in the energy and industrials sectors. He previously held senior positions at Ampol Limited and in the oil and gas department of Glencore plc, which followed extensive experience in private equity and investment banking in Sydney, London and Singapore.

He is a graduate of the Harvard Business School Advanced Management Program.

Steve joined Santos in 2021 and was appointed Executive Vice President, Operations and Technical Services Corporate Function in December 2023. He is responsible for global operations management systems, capabilities and performance oversight across production operations, asset integrity and process safety, production and emissions planning, major projects, drilling and completions, health, safety and security, digital and transformation. In his previous roles at Santos, Steve led the Company’s developments and projects, drilling and completions, production operations, decommissioning and supply chain functions.

Steve has 25 years of global experience in the oil and gas industry. Before joining Santos, he spent 22 years at Woodside Energy where he held technical and operational leadership roles across drilling and completions, supply chain logistics, development and project coordination, production operations and asset management, including leadership of the North West Shelf Project’s Karratha LNG asset. Steve also served in strategy, business management and governance roles, including as Vice President of Strategy, Planning and Analysis.

Tracey joined Santos in 2017 and is Chief Strategy Officer and Chief of Staff, responsible for corporate and ESG strategy, media and external communications, and management of the CEO office. She previously held roles including Head of Government and Public Affairs and Strategic Adviser External Affairs.

She joined Santos with 30 years of experience in the oil and gas industry, in diverse roles including government and regulatory affairs, media and communications, environment, land access, project commercialisation, construction and asset management. She held a senior role in federal resources and energy policy and politics for seven years, and over more than a decade built a successful government approvals and environmental management consultancy, serving some of Australia’s biggest resource companies and delivering major project approvals for some of the nation’s biggest gas and pipeline projects. From 2011 to 2016, Ms Winters drove the environmental approvals and land access processes to deliver the QCLNG project. In 2016-17, she advised Caltex Australia on public affairs and strategic issues management, in particular wage underpayment by franchisees.