Santos Executive and Leadership Team

June, 2026

Leadership Overview

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

Driven by a commitment to sustainable energy, Santos focuses on onshore oil and gas production, leveraging decades of experience to meet global energy demands and contribute to Australia's energy landscape.

Leadership Roles at Santos

  • Chief Executive Officer - Marcio Santos
  • Chief Executive Officer and MD - Anna Marie
  • Partner & Chief Executive Officer - Mariana Souza
  • Managing Director & Chief Executive Officer - Kevin Gallagher
  • Chief Financial Officer - Regina Galter
  • 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 overarching strategy and operational execution. This leadership role involves guiding the organization through market dynamics and ensuring alignment with long-term objectives. Marcio Santos oversees the integration of various business units to foster synergy and drive performance. The Chief Executive Officer's responsibilities extend to stakeholder engagement and representing the company's vision to investors and the broader industry. This executive ensures that all departments function cohesively to achieve strategic goals and maintain market competitiveness. The focus remains on optimizing resource allocation and driving sustainable growth within the energy sector.

    Anna Marie - Chief Executive Officer and MD

    Anna Marie, the Chief Executive Officer and MD at Santos, spearheads the company's strategic direction and daily management. This dual role encompasses setting the corporate vision and ensuring its effective implementation across all operational facets. Anna Marie drives initiatives aimed at enhancing operational efficiency and exploring new market opportunities within the energy sector. The Chief Executive Officer and MD's purview includes fostering a culture of innovation and accountability throughout the organization. This leadership position is critical for navigating complex regulatory environments and maintaining strong investor relations. Anna Marie ensures the company's long-term viability and growth trajectory through decisive leadership and strategic foresight.

    Mariana Souza - Partner & Chief Executive Officer

    Mariana Souza, the Partner & Chief Executive Officer at Santos, leads the firm's strategic partnerships and executive management. This position involves cultivating key alliances and directing the company's overall business strategy. Mariana Souza is responsible for identifying and capitalizing on growth opportunities, ensuring the firm remains at the forefront of the energy industry. The Partner & Chief Executive Officer's role includes overseeing financial performance and driving operational excellence across all divisions. This leadership ensures that strategic objectives are met while maintaining a strong focus on stakeholder value. Mariana Souza's guidance is pivotal in shaping the company's market presence and competitive advantage.

    Kevin Gallagher - Managing Director & Chief Executive Officer

    Kevin Gallagher, the Managing Director & Chief Executive Officer at Santos, orchestrates the company's comprehensive business strategy and operational oversight. This critical role involves setting the long-term vision and ensuring its execution across all global operations. Kevin Gallagher drives initiatives focused on sustainable energy production and market expansion, aligning corporate objectives with industry advancements. The Managing Director & Chief Executive Officer's responsibilities include managing investor relations and fostering strategic partnerships to enhance the company's market position. This leadership ensures robust financial performance and operational resilience. Kevin Gallagher's direction is fundamental to Santos' continued success and its role in the energy sector.

    Regina Galter - Chief Financial Officer

    Regina Galter, the Chief Financial Officer at Santos, directs all financial planning, management, and reporting activities. This executive oversees the company's fiscal health, ensuring robust financial strategies are in place to support growth and operational objectives. Regina Galter manages capital allocation, investment strategies, and risk management to safeguard the company's assets. The Chief Financial Officer's role involves close collaboration with other C-suite leaders to align financial goals with overall business strategy. This leadership ensures compliance with financial regulations and drives shareholder value through prudent financial stewardship. Regina Galter's expertise is crucial for maintaining financial stability and enabling strategic investments in the energy sector.

    Willys Santos - Chief Financial Officer, Finance Director

    Willys Santos, the Chief Financial Officer, Finance Director at Santos, leads the financial operations and strategic financial planning for the organization. This executive is responsible for managing the company's financial resources, including budgeting, forecasting, and financial analysis. Willys Santos ensures the integrity of financial reporting and compliance with all relevant accounting standards and regulations. The Chief Financial Officer, Finance Director's role involves advising executive leadership on financial matters and supporting strategic decision-making. This leadership position is critical for maintaining financial discipline and optimizing capital structure. Willys Santos plays a key part in driving financial performance and ensuring the company's economic stability.

    Matthew Elmer - Chief Operating Officer

    Matthew Elmer, the Chief Operating Officer at Santos, oversees the company's day-to-day operational functions and production activities. This role is central to ensuring efficient and safe execution of all exploration and production processes. Matthew Elmer drives operational improvements, focusing on optimizing resource utilization and enhancing productivity across all sites. The Chief Operating Officer's responsibilities include managing supply chain logistics and implementing best practices in operational management. This leadership ensures that production targets are met while adhering to stringent safety and environmental standards. Matthew Elmer's focus is on maximizing operational output and contributing to the company's overall profitability and sustainability.

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

    Brett Darley, the Chief Operating Officer, & Png Upstream (Australia) at Santos, manages the upstream operations within Australia, focusing on oil and gas production. This executive directs the exploration, development, and production activities in the Australian region, ensuring efficient resource extraction. Brett Darley oversees the implementation of advanced technologies and operational strategies to maximize output and minimize costs. The Chief Operating Officer, & Png Upstream (Australia)'s role involves ensuring compliance with all regulatory requirements and environmental standards specific to Australian operations. This leadership is vital for driving the success of Santos' Australian assets and contributing significantly to the company's overall production goals. Brett Darley ensures operational excellence in a key geographic market.
    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 dual role ensures that operational activities are compliant and financially optimized. Dumal Yuke oversees strategies to maximize revenue streams from existing and new ventures, focusing on market penetration and sales growth. The Permit Coordinator and Chief Revenue Officer's responsibilities include streamlining the acquisition of necessary permits for exploration and production, ensuring timely project commencement. This leadership ensures that revenue targets are met while maintaining operational continuity and regulatory adherence. Dumal Yuke's expertise bridges operational compliance with aggressive revenue growth objectives.

    Lisa Walker - Chief Medical Officer

    Lisa Walker, the Chief Medical Officer at Santos, oversees the health and well-being programs for all employees and stakeholders. This executive directs the development and implementation of comprehensive healthcare strategies, ensuring a safe and healthy working environment. Lisa Walker manages occupational health services, medical emergency response protocols, and wellness initiatives across the company's operations. The Chief Medical Officer's role involves ensuring compliance with health regulations and promoting a culture of safety and preventative care. This leadership is crucial for supporting the workforce, particularly in remote operational areas. Lisa Walker's focus is on maintaining the highest standards of health and safety for all personnel.

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    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 Anna Marie (Chief Executive Officer and MD) and Mariana Souza (Partner & Chief Executive Officer).
    Who is part of Santos’s executive team?
    The executive team of Santos includes leaders such as Marcio Santos (Chief Executive Officer), Anna Marie (Chief Executive Officer and MD), Mariana Souza (Partner & Chief Executive Officer) 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, Chief Executive Officer and MD, Partner & Chief Executive Officer, Managing Director & Chief Executive Officer, Chief Financial Officer.