Northern Star Resources Executive and Leadership Team

August, 2026

Leadership Overview

Northern Star Resources has 4 executives leading key functions including strategy, finance, operations, and legal compliance.

Focused on sustainable gold production, Northern Star Resources prioritizes operational excellence and long-term value creation across its diverse mining portfolio in Australia and North America.

Leadership Roles at Northern Star Resources

  • Managing Director & Chief Executive Officer - Stuart Tonkin
  • Chief Financial Officer - Ryan Gurner
  • Chief Operating Officer - Kalgoorlie - Simon Jessop
  • Chief Legal Officer & Company Secretary - Hilary Macdonald
  • Stuart Tonkin - Managing Director & Chief Executive Officer

    Stuart Tonkin, the Managing Director & Chief Executive Officer at Northern Star Resources, directs the overarching corporate strategy and global growth initiatives. Tonkin oversees the integration of high-quality gold mining operations across Western Australia and Alaska, ensuring alignment with long-term production targets. By managing the portfolio of underground and open-pit mines, the Managing Director & Chief Executive Officer drives operational efficiency and capital allocation discipline. This leadership role involves constant engagement with the Board to maintain robust corporate governance standards. Through the implementation of advanced mining technologies, Stuart Tonkin optimizes gold recovery rates across all assets. The Managing Director & Chief Executive Officer also fosters positive relationships with Indigenous stakeholders and local communities to support sustainable mining practices. By focusing on organic growth and strategic acquisitions, Tonkin secures the company's position as a significant player in the global gold mining industry while maintaining a strong pipeline of development projects.
    Stuart Tonkin

    Ryan Gurner - Chief Financial Officer

    Ryan Gurner, the Chief Financial Officer at Northern Star Resources, manages the financial health and capital structure of the organization. Gurner oversees all fiscal reporting, budgeting, and investment analysis to support the company's expansion across Western Australia and Alaska. By monitoring cost structures and operational expenditures, the Chief Financial Officer ensures the company maintains high margins within the competitive gold mining sector. This role involves coordinating with the Board to provide transparent financial disclosures and maintain compliance with Australian Securities Exchange standards. Ryan Gurner drives disciplined capital allocation strategies, enabling the funding of exploration activities and the extension of mine life. Through rigorous financial oversight, the Chief Financial Officer mitigates market risks and optimizes cash flow generation. By balancing investment in modern processing facilities with shareholder returns, Gurner secures the financial stability necessary for Northern Star Resources to pursue its long-term growth objectives in the global market.

    Simon Jessop - Chief Operating Officer - Kalgoorlie

    Simon Jessop, the Chief Operating Officer - Kalgoorlie at Northern Star Resources, directs all mining activities within the prolific Kalgoorlie gold region. Jessop oversees the daily performance of major mining complexes, ensuring safety and environmental standards remain at the forefront of operations. By implementing advanced processing techniques, the Chief Operating Officer - Kalgoorlie maximizes gold recovery and operational throughput. This leadership role requires constant collaboration with site managers to optimize underground and open-pit extraction methods. Simon Jessop drives continuous improvement initiatives to reduce costs and enhance productivity across the regional asset base. By managing the complex logistics of large-scale mining, the Chief Operating Officer - Kalgoorlie ensures consistent production output that meets corporate targets. Through the application of technical expertise, Jessop maintains the integrity of the mineral resource base, supporting the company's commitment to operational excellence and sustainable development within the rich mining heritage of Western Australia.
    Hilary Macdonald, the Chief Legal Officer & Company Secretary at Northern Star Resources, manages all legal affairs and corporate governance frameworks. Macdonald oversees regulatory compliance across the company's diverse operations in Western Australia and Alaska, ensuring adherence to international mining laws and local statutes. By providing strategic counsel to the Board, the Chief Legal Officer & Company Secretary mitigates legal risks associated with exploration and development projects. This role involves maintaining transparent reporting practices and managing relationships with regulatory bodies to uphold the company's reputation. Hilary Macdonald drives the implementation of internal policies that support environmental stewardship and ethical conduct. Through the oversight of contractual agreements and stakeholder negotiations, the Chief Legal Officer & Company Secretary protects the company's interests during strategic acquisitions and joint ventures. By ensuring rigorous adherence to corporate governance standards, Macdonald supports the long-term stability and operational success of Northern Star Resources in the global gold mining sector.
    Hilary Macdonald

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    Frequently Asked Questions Regarding Northern Star Resources Top Executives and Leadership Team

    Who leads Northern Star Resources?
    Northern Star Resources is led by Stuart Tonkin (Managing Director & Chief Executive Officer), along with executives such as Ryan Gurner (Chief Financial Officer) and Simon Jessop (Chief Operating Officer - Kalgoorlie).
    Who is part of Northern Star Resources’s executive team?
    The executive team of Northern Star Resources includes leaders such as Stuart Tonkin (Managing Director & Chief Executive Officer), Ryan Gurner (Chief Financial Officer), Simon Jessop (Chief Operating Officer - Kalgoorlie) and other senior executives.
    How many executives does Northern Star Resources have?
    Northern Star Resources has 4 executives leading key business areas.
    What roles are included in Northern Star Resources’s leadership team?
    The leadership team of Northern Star Resources includes roles such as Managing Director & Chief Executive Officer, Chief Financial Officer, Chief Operating Officer - Kalgoorlie, Chief Legal Officer & Company Secretary.