Santos Executive and Leadership Team

May, 2026

Leadership Overview

Santos has 10 executives leading key functions including strategy, finance, operations, and revenue.

Driven by a commitment to sustainable energy solutions, Santos focuses on maximizing value from onshore oil and gas assets while prioritizing operational excellence and stakeholder returns.

Leadership Roles at Santos

  • Chief Executive Officer - Marcio Santos
  • Managing Director & Chief Executive Officer - Kevin Gallagher
  • Chief Executive Officer and MD - Anna Marie
  • Partner & Chief Executive Officer - Mariana Souza
  • Chief Financial Officer - David Knox
  • Chief Financial Officer, Finance Director - Willys Santos
  • Chief Operating Officer - Matthew Elmer
  • Chief Operating Officer, & Png Upstream (Australia) - Brett Darley
  • Permit Coordinator and Chief Revenue Officer - Dumal Yuke
  • Chief Medical Officer - Lisa Walker
  • Marcio Santos - Chief Executive Officer

    Marcio Santos, the Chief Executive Officer at Santos, directs the company's overall strategic vision and operational execution. This leadership role involves guiding the organization through dynamic market conditions, ensuring alignment with long-term growth objectives. Marcio Santos oversees the integration of all business units, fostering a culture of innovation and efficiency across the energy sector. The Chief Executive Officer's responsibilities extend to stakeholder engagement, investor relations, and maintaining the company's competitive edge in the Australian energy landscape. This executive drives the company's mission to deliver reliable energy resources.

    Kevin Gallagher - Managing Director & Chief Executive Officer

    Kevin Gallagher, the Managing Director & Chief Executive Officer at Santos, spearheads the company's strategic direction and operational management. This executive guides the organization's expansion efforts and ensures robust performance across all divisions. Kevin Gallagher's leadership focuses on optimizing resource development and maximizing shareholder value within the Australian energy market. The Managing Director & Chief Executive Officer oversees critical decisions regarding exploration, production, and asset management, driving sustainable growth. This role involves significant engagement with regulatory bodies and industry partners to advance Santos's operational footprint.

    Anna Marie - Chief Executive Officer and MD

    Anna Marie, the Chief Executive Officer and MD at Santos, commands the company's strategic initiatives and day-to-day operations. This leadership position involves steering the organization towards its core objectives in the energy sector. Anna Marie's focus is on enhancing operational efficiency and driving profitable growth across all business segments. The Chief Executive Officer and MD is responsible for fostering a high-performance culture and ensuring the company's long-term sustainability. This executive champions strategic partnerships and oversees the effective deployment of capital to maximize asset value and market position.

    Mariana Souza - Partner & Chief Executive Officer

    Mariana Souza, the Partner & Chief Executive Officer at Santos, directs the firm's strategic partnerships and overall business trajectory. This executive leads the company's engagement with key stakeholders and oversees the execution of its core business strategies. Mariana Souza's role involves driving innovation and ensuring operational excellence across all ventures. The Partner & Chief Executive Officer is instrumental in shaping the company's market presence and fostering collaborative relationships within the energy industry. This leadership position ensures the company's continued success and expansion.

    David Knox - Chief Financial Officer

    David Knox, the Chief Financial Officer at Santos, manages the company's financial health and strategic fiscal planning. This executive oversees all financial operations, including budgeting, forecasting, and capital allocation, ensuring robust financial performance. David Knox's responsibilities encompass risk management, investor relations, and driving financial strategies that support the company's growth objectives in the energy sector. The Chief Financial Officer plays a critical part in evaluating investment opportunities and optimizing the company's capital structure. This leadership ensures financial stability and supports long-term value creation for shareholders.

    Willys Santos - Chief Financial Officer, Finance Director

    Willys Santos, the Chief Financial Officer, Finance Director at Santos, oversees the company's comprehensive financial strategy and management. This executive directs all aspects of financial planning, reporting, and investment analysis, ensuring fiscal discipline and strategic resource allocation. Willys Santos's role involves managing financial risks, optimizing capital structure, and supporting executive decisions with robust financial insights. The Chief Financial Officer, Finance Director is integral to maintaining the company's financial integrity and driving sustainable profitability. This leadership ensures the financial framework supports the company's operational goals and market expansion.

    Matthew Elmer - Chief Operating Officer

    Matthew Elmer, the Chief Operating Officer at Santos, directs the company's operational activities and ensures efficient resource management. This executive oversees the execution of production strategies and the optimization of operational processes across all assets. Matthew Elmer's leadership focuses on enhancing safety, environmental performance, and operational reliability within the energy sector. The Chief Operating Officer is responsible for managing the company's onshore oil and gas production facilities, driving efficiency and cost-effectiveness. This role is crucial for maintaining consistent output and achieving production targets.

    Brett Darley - Chief Operating Officer, & Png Upstream (Australia)

    Brett Darley, the Chief Operating Officer, & Png Upstream (Australia) at Santos, leads operational execution for the company's upstream activities in Australia. This executive directs the development and management of oil and gas assets, focusing on maximizing production and operational efficiency. Brett Darley's responsibilities include overseeing exploration, drilling, and production operations, ensuring adherence to stringent safety and environmental standards. The Chief Operating Officer, & Png Upstream (Australia) plays a key role in optimizing resource extraction and managing project lifecycles. This leadership ensures the successful delivery of energy resources from Australian operations.
    Brett Darley

    Dumal Yuke - Permit Coordinator and Chief Revenue Officer

    Dumal Yuke, the Permit Coordinator and Chief Revenue Officer at Santos, drives revenue generation and manages critical permitting processes. This executive oversees strategies to maximize income streams from the company's energy assets while ensuring compliance with all regulatory requirements. Dumal Yuke's dual focus ensures that operational permits are secured efficiently, facilitating uninterrupted revenue generation. The Chief Revenue Officer is responsible for developing and implementing sales strategies, managing customer relationships, and identifying new market opportunities. This role is vital for the company's financial growth and operational continuity.

    Lisa Walker - Chief Medical Officer

    Lisa Walker, the Chief Medical Officer at Santos, directs the company's health and safety initiatives, ensuring the well-being of its workforce. This executive oversees the development and implementation of comprehensive medical programs and occupational health strategies. Lisa Walker's focus is on maintaining a safe working environment and providing expert medical guidance across all operational sites. The Chief Medical Officer plays a critical role in managing health risks, emergency preparedness, and promoting a culture of health and wellness. This leadership ensures compliance with health regulations and supports the overall operational resilience of the company.

    Explore Leadership Teams in Energy, Utilities & Waste

    Frequently Asked Questions Regarding Santos Top Executives and Leadership Team

    Who leads Santos?
    Santos is led by Marcio Santos (Chief Executive Officer), along with executives such as Kevin Gallagher (Managing Director & Chief Executive Officer) and Anna Marie (Chief Executive Officer and MD).
    Who is part of Santos’s executive team?
    The executive team of Santos includes leaders such as Marcio Santos (Chief Executive Officer), Kevin Gallagher (Managing Director & Chief Executive Officer), Anna Marie (Chief Executive Officer and MD) and other senior executives.
    How many executives does Santos have?
    Santos has 10 executives leading key business areas.
    What roles are included in Santos’s leadership team?
    The leadership team of Santos includes roles such as Chief Executive Officer, Managing Director & Chief Executive Officer, Chief Executive Officer and MD, Partner & Chief Executive Officer, Chief Financial Officer.