Jeff joined Alinta Energy as CEO in 2011 and became Managing Director & CEO in April 2017.
Jeff is a senior figure in the Australian energy sector with around 30 years of experience. He is a former Chair of the Australian Energy Council and current board member.
Jeff was also a founding member of Australia’s Clean Energy Council, having previously served on the Boards of The Renewable Energy Generators of Australia and the Australian Wind Energy Association.
He helped pioneer many of Australia’s earliest renewable energy developments including several wind farms and a large-scale solar project prior to joining Alinta Energy.
Jeff’s formal qualifications include a Bachelor of Business degree from RMIT University and an Executive Programme at IMD in Switzerland.

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 clean 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 cleaner energy and clean 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.

Mahesh has nearly three decades of operations, commercial and project leadership expertise within the energy industry (upstream and downstream). During his 19-year tenure at McDermott, he has held senior positions in strategy, commercial and major projects.
He has extensive global experience, in both large-scale project and corporate roles, with a career spanning across Asia, Australia, the Middle East and Europe. Prior to joining McDermott, Mahesh worked for Saipem, Reliance and Kvaerner John Brown.
He holds a bachelor’s degree in mechanical engineering, a post-graduate diploma in project management and a master’s degree in contracts law and arbitration.
Mahesh is part of McDermott’s Executive Committee and is currently leading the Global Subsea and Floating Facilities business line.
Mahesh is based in Kuala Lumpur, Malaysia.

Cecile became Country Chair and Senior Vice President Integrated Gas of Shell Australia in May 2023. She brings 25 years of international experience in LNG, oil and gas project development and operations and mergers and acquisitions. Previously Cecile was CEO of Arrow Energy, Shell’s joint venture with PetroChina, which she commenced in 2020. She has also held senior commercial leadership roles at Shell Australia, where she was VP Commercial and New Business Development, and as Growth Director with BG Group, prior to its acquisition by Shell.
Before joining Shell and BG Group, Cecile was a corporate partner at the leading international law firm Herbert Smith Freehills in London for nine years. Her corporate energy practice focused on complex cross-border oil, gas and LNG project development, high-value mergers and acquisition transactions in the energy and mining sectors and long-term sales arrangements for oil, gas and LNG.
Outside Shell, Cecile is a Board Director of Australian Energy Producers and a member of the Senate of the University of Queensland, where she serves on the Finance and Campus Infrastructure Committees.
Cecile has a Bachelor of Economics and a Bachelor of Laws (Honours) from The University of Queensland. She represented Australia at seven World Championships and multiple World Cups in the sport of Modern Pentathlon between 1995 - 2001. Cecile and her husband, Alex, have two children and live in Brisbane.

Samantha McCulloch is the Chief Executive of Australian Energy Producers, the peak national body representing Australia’s explorers, developers and producers of essential energy - oil, gas and lower-emission fuels.
An internationally recognised carbon capture, utilisation and storage (CCUS) expert, Ms McCulloch has a highly informed view of the critical role the oil and gas industry continues to play in meeting global energy and climate goals.
Before joining APPEA in 2022, she spent seven years at the International Energy Agency including four years as head of the CCUS Unit.
Ms McCulloch has more than 20 years of policy, industry and technical expertise from previous roles within government, industry associations and the private sector in Australia and internationally.
She holds a Bachelor of Laws (Hons) and Bachelor of Commerce (with Distinction) from the University of Wollongong, as well as a Master of Public Policy from the Australian National University.