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.

Brett is the Chief Operating Officer for Australia and PNG Upstream Oil and Gas, responsible for overseeing day-to-day operations across the Company’s upstream assets in Australia and Papua New Guinea.

Brett has more than 35 years of international experience in the upstream oil and gas industry, spanning technical, operational and executive leadership roles across onshore and offshore assets. Since joining Santos in 2018, he has also served as Executive Vice President Eastern Australia and PNG, and President of the Upstream Gas and Liquids Division.

He has previously held senior roles including Chief Executive Officer of Quadrant Energy, Managing Director and Region Vice President at 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. He also chairs the Board of Hela Provincial Health Authority in PNG.

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 of 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.

Lachlan Harris was appointed Chief Financial Officer in December 2025, bringing more than 15 years of experience in the oil and gas industry, and a background in corporate finance and financial operations.

Since joining Santos in 2010, Lachlan has held a range of senior finance roles including Treasurer and Deputy Chief Financial Officer, and Group Controller from 2019 to 2023. As Group Controller, he led the finance function and played a key role in the financial integration of major transactions, including the acquisitions of Quadrant Energy and ConocoPhillips’ northern Australian assets, and the merger with Oil Search.

Before joining Santos, Lachlan was a Senior Manager at KPMG.

He is a Fellow of Chartered Accountants Australia and New Zealand and holds a Bachelor of Commerce from Flinders University.

Amelia joined Santos in May 2023 and is Group General Counsel and Senior Vice President Governance. In this role Amelia is responsible for overseeing the Company’s Legal, Company Secretariat, Business Integrity, Risk, Audit and Compliance, Approvals and Access functions. She previously held the role of Deputy General Counsel.

Amelia has over 25 years’ experience in legal, company secretariat, commercial, business development and corporate areas of listed international oil and gas companies in Australia, Papua New Guinea, Asia and North America.  She has held leadership roles at Repsol and Cooper Energy (now Amplitude Energy), and prior to that practiced law at King & Spalding in the Middle East with a focus on upstream resources and LNG projects, and corporate law.

Amelia has previously served as President of, and currently serves on the Board of, the Energy & Resources Law Association. She has a Bachelor of Laws (Hons) and a Bachelor of Arts from Flinders University, and a Master of Laws from the University of Melbourne.

Kim joined Santos in January 2023, as Executive Vice President, People and Culture. Kim is responsible for delivering the people strategy and experience at Santos.

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.

Sean joined Santos in September 2020 as Vice President Marketing, Trading and 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.

Alan joined Santos in August 2023 as Executive Vice President, Midstream & Energy Solutions. He is accountable for Santos Midstream & Energy Solutions portfolio management and strategy, encompassing our midstream operations, carbon capture and storage, and low carbon fuels activities.

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

Alan has a Bachelor of Science (Business Administration) and is a graduate of the Harvard Business School Advanced Management Program. He is also a Graduate of the Australian Institute of Company Directors.

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, responsible for corporate, portfolio and ESG strategy, commercial, business development and M&A functions, government affairs and social performance. Tracey is also a member of the Santos Foundation board.

She has 40 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 (now Ampol) on public affairs and strategic issues management, in particular wage underpayment by franchisees.