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.
Prior to joining CS Energy, Brian served as Group Executive and President of Latin America for Orica, where he led a significant operational and cultural transformation delivering positive safety, employee engagement, and financial outcomes.
Brian’s leadership in complex infrastructure and mining operations aligns with CS Energy’s focus on modernising its asset portfolio, improving reporting processes, and delivering on the Queensland Government’s Electricity Maintenance Guarantee.
Emma Roberts joined CS Energy in 2012; her in-depth knowledge of the National Electricity Market coupled with her commercial acumen and leadership skills has seen her hold a number of senior roles including Senior Legal Counsel, Acting Executive General Counsel and Company Secretary, Head of Future Energy, and Acting CEO.
Spearheading the development of a new low-cost, decarbonised, and flexible energy portfolio for the business, Emma has brought together CS Energy's energy markets and customer facing functions, strategy, commercial partnerships, policy and regulation, future energy development, and resources and commercial.
Emma has developed a strong reputation for leading cross-functional teams to deliver positive business outcomes. She led the establishment of CS Energy’s retail function and has driven CS Energy’s pivot towards a customer-focused culture as the business diversifies in response to the transformation of the energy system.
Emma holds degrees in law and applied science. Prior to joining CS Energy, she was a senior associate at McCullough Robertson Lawyers for eight years, working in the corporate and intellectual property teams.
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.
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 April 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.
Barry Millar
Executive General Manager People, Safety, and Transformation
B. Eng (Hons) Mechanical Engineering
Barry Millar commenced as Executive General Manager People, Safety, and Transformation on 31 March 2025. In this role he leads business improvement; people and culture; health, safety and environment; and the Transformation Office.
Prior to this appointment, Barry had been leading CS Energy's Asset Management division since September 2022, responsible for asset strategy, engineering, capital projects, unit overhauls, and plant data analysis.
Barry joined CS Energy from AGL, where he held numerous strategic leadership roles over 13 years including leading operational excellence and organisational transformation, as well as asset management across the entire generation, mining, and gas portfolio.
Before moving to Australia, Barry had been working in the energy industry in the UK since the late 1980s.
Mark Powell
Executive General Manager Stakeholder Relations and Corporate Governance
B Bus, LLB, MCPRA, MAICD
Mark Powell joined CS Energy as EGM Stakeholder Relations and Corporate Governance on 14 April 2025, providing 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.