Brian Gillespie was appointed as CS Energy’s Chief Executive Officer in June 2025, bringing executive and non-executive leadership experience from a diverse, international career spanning the mining, transport, logistics, technology, oil and gas, and health sectors. Brian holds the degrees of MBA, Bachelor of Science (Hons) and is a Fellow and Chartered Electrical Engineer with the IET.
Brian has led large organisations in Australia, Latin America and Europe with a track record of improving safety, operational efficiency and organisational culture. Brian’s leadership in safety, complex assets and mining operations aligns with CS Energy’s focus on modernising its asset portfolio and delivering on the Queensland Government’s Electricity Maintenance Guarantee.
Andrew Buswell
Chief Operating Officer
BSc (Hon), MBA
Andrew Buswell joined CS Energy as Chief Operating Officer on 31 March 2025 to lead our operations across the company's generation fleet, aligning asset management and operational responsibilities with process safety. He leads CS Energy's key plant operations functions including operations and maintenance, engineering services and governance, overhauls, process safety, performance reliability and analytics, and health, safety and environment.
With more than 30 years of global experience in the resources and mining sectors, Andrew has consistently delivered results in operational excellence, capital projects, and asset management through leadership roles at organisations including Rio Tinto, BHP, Orica, and Xenco Mining Services.
Andrew's ability to drive innovation and operational improvements across complex industries makes him a key contributor in maximising CS Energy's assets.
Cameron Collins
Chief Financial Officer
B Bus, CA, GAICD
Cameron Collins was appointed as Chief Financial Officer in 2024 after acting in the role for 12 months. He leads CS Energy's CFO division, and is responsible for functions such as finance, energy and financial risk, digital and technology, procurement, business planning, performance reporting, and insurance.
Prior to this, Cameron was CS Energy's Head of Finance, where he was responsible for financial reporting and management accounting, budgeting and forecasting, treasury, taxation, investment governance, and finance shared services.
Cameron joined CS Energy in 2009, during which time he has developed a thorough knowledge of the energy sector and demonstrated strong commercial and financial acumen and leadership capability, which has resulted in Cameron also holding other senior leadership and executive leadership roles including Head of Risk and Compliance and Acting Chief Financial Officer.
Prior to joining CS Energy, Cameron held several senior finance roles working in industry across both business advisory, and audit and assurance disciplines.
Mark Powell
Chief Corporate Services Officer
B Bus, LLB, MCPRA, MAICD
Mark Powell joined on 14 April 2025 and provides strategic oversight across a range of critical functions, including corporate affairs, legal, company secretariat, internal audit, risk and compliance, and data governance functions.
He has more than 20 years’ experience in corporate and regulatory affairs, public policy, risk management and strategy, including senior executive roles leading multidisciplinary teams to develop and implement governance and sustainability strategies that enhance reputation and build stakeholder trust.
Mark is a management consultant and lawyer who has held leadership positions in companies across a number of highly regulated sectors in Australia and overseas, including energy, financial services and consumer goods. Prior to joining CS Energy, he served as General Manager Sustainability and Corporate Affairs at MLC Life Insurance.
Mark’s unique blend of experience will help ensure CS Energy remains at the forefront of the evolving energy landscape.
Sophie Sangster
Acting Chief Commercial Officer
LLB, Grad Dip Legal Practice, LLM
Sophie commenced as the Acting Chief Commercial Officer in August 2025. Sophie is responsible for CS Energy’s trading team, retail business, commercial partnerships, joint ventures and resources.
Prior to her appointment, Sophie was CS Energy’s General Counsel. Sophie has had close to 20 years’ experience in both private practice and in-house legal teams. Prior to joining CS Energy, Sophie was Head of Commercial at an ASX listed infrastructure contractor and has extensive experience across sectors such as government, energy, facilities services, defence, utilities, roads, transport and major infrastructure projects.
Michael Lynch
Acting Chief Energy Transition Officer
BAppSc (Maths), BAppSc (Hons), GradDipAppFin, MAppFin
Michael commenced as the Acting Chief Energy Transition Officer in August 2025 and is responsible for the development of CS Energy’s future energy asset portfolio, including firming and renewable development, infrastructure delivery and sustainability.
Prior to this appointment, Michael was the Head of Energy and Financial Risk from November 2023, where he was responsible for financial, operational and compliance risk oversight across CS Energy’s commercial functions, including trading, retail and future energy development activities.
Michael has over 20 years' experience across the energy, mining and financial services industries in financial and non-financial risk management, compliance and trade finance. He has led diverse international teams for large multinationals including BHP and South32.