Orica Executive and Leadership Team

September, 2026

Leadership Overview

Orica has 10 executives leading key functions including strategy, financial oversight, digital innovation, and human capital management.

Focused on sustainable resource mobilization, Orica delivers advanced blasting systems and geotechnical monitoring to global mining operations while driving industry-leading infrastructure solutions through cutting-edge digital integration.

Leadership Roles at Orica

  • Chief Executive Officer - Graeme Liebelt
  • Interim Chief Executive Officer - Exsa Tacna
  • Chief Financial Officer - Christopher Spriggs
  • Chief Financial Officer, Axis Mining Technology - Ailsa Miller
  • President, Orica Digital Solutions & Chief Technology Officer - Angus Melbourne
  • Chief of Staff - Renee Brennan
  • Chief Information Officer (North America) - John Weiss
  • Vice President & Chief Technology Officer - Guolin Wang
  • Chief Communications Officer - Delphine Cassidy
  • Chief People Officer - Sally Cox
  • Graeme Liebelt - Chief Executive Officer

    Graeme Liebelt, the Chief Executive Officer at Orica, directs the overarching strategic vision for global mining and infrastructure operations. Liebelt manages the deployment of explosives and blasting systems across diverse international markets, ensuring alignment with long-term sustainability goals. By coordinating with the Board, the Chief Executive Officer optimizes resource allocation to maintain market leadership in specialty mining chemicals. This executive role involves constant evaluation of geotechnical monitoring capabilities to enhance safety and efficiency for clients. Graeme Liebelt drives the expansion of service offerings, ensuring that the company remains at the forefront of the mining sector. Through rigorous oversight of operational performance, the Chief Executive Officer secures competitive advantages in complex environments. Liebelt maintains a focus on delivering value to stakeholders while navigating the evolving demands of the global resource industry, ultimately strengthening the market position of the organization through disciplined leadership and strategic foresight.

    Exsa Tacna - Interim Chief Executive Officer

    Exsa Tacna, the Interim Chief Executive Officer at Orica, executes critical leadership transitions while maintaining operational continuity across all mining and infrastructure divisions. Tacna oversees the immediate delivery of blasting systems and specialty chemicals, ensuring that supply chains remain robust during periods of organizational change. The Interim Chief Executive Officer facilitates communication between executive teams to uphold safety standards and performance metrics. By monitoring the deployment of geotechnical solutions, Exsa Tacna ensures that client requirements receive consistent attention. This role involves stabilizing internal processes and fostering collaboration across regional business units to support ongoing project success. Tacna drives efficiency in the production of mining materials, mitigating risks associated with large-scale resource extraction. Through decisive management, the Interim Chief Executive Officer preserves the integrity of the company mission, ensuring that all operational objectives align with the broader strategic goals established for the global mining market.

    Christopher Spriggs - Chief Financial Officer

    Christopher Spriggs, the Chief Financial Officer at Orica, manages the fiscal health and capital allocation strategies for the entire organization. Spriggs oversees financial reporting, budgeting, and investment planning related to the production of explosives and geotechnical monitoring tools. The Chief Financial Officer ensures that capital expenditures align with the company mission of sustainable resource mobilization. By analyzing market trends in the mining sector, Christopher Spriggs provides the data-driven insights necessary for strategic expansion and risk management. This role involves maintaining strong relationships with investors and financial institutions to support the long-term viability of infrastructure solutions. Spriggs drives financial discipline across all business units, ensuring that operational costs remain optimized while supporting innovation in specialty chemicals. Through rigorous oversight of the balance sheet, the Chief Financial Officer secures the necessary funding for technological advancements, ultimately enabling the company to maintain a competitive edge in the global mining industry.

    Ailsa Miller - Chief Financial Officer, Axis Mining Technology

    Ailsa Miller, the Chief Financial Officer, Axis Mining Technology at Orica, directs the financial strategy for the specialized technology division focused on mining innovation. Miller manages the budget and investment portfolio for digital solutions and advanced geotechnical monitoring tools. The Chief Financial Officer, Axis Mining Technology ensures that the development of new technologies remains financially viable and aligned with the company mission of sustainable resource mobilization. By overseeing the fiscal performance of the technology unit, Ailsa Miller supports the rapid deployment of cutting-edge mining tools to global markets. This role involves evaluating the return on investment for research and development projects, ensuring that innovation drives long-term profitability. Miller manages financial risks associated with technological advancement, providing the stability needed for the division to thrive. Through precise financial planning, the Chief Financial Officer, Axis Mining Technology enables the organization to maintain its status as a leader in mining technology and infrastructure solutions.

    Angus Melbourne - President, Orica Digital Solutions & Chief Technology Officer

    Angus Melbourne, the President, Orica Digital Solutions & Chief Technology Officer at Orica, leads the development and deployment of digital platforms that revolutionize mining operations. Melbourne oversees the integration of software and hardware, ensuring that blasting systems and geotechnical monitoring tools utilize the latest technological advancements. The President, Orica Digital Solutions & Chief Technology Officer drives the innovation agenda, focusing on creating sustainable solutions that optimize resource extraction. By managing the digital solutions portfolio, Angus Melbourne ensures that the company remains at the forefront of the industry. This role involves collaborating with global teams to implement data-driven strategies that improve safety and efficiency for mining clients. Melbourne manages the research and development pipeline, ensuring that new technologies align with the company mission of sustainable resource mobilization. Through visionary leadership, the President, Orica Digital Solutions & Chief Technology Officer transforms complex mining challenges into digital opportunities, securing the future of the organization.
    Angus Melbourne

    Renee Brennan - Chief of Staff

    Renee Brennan, the Chief of Staff at Orica, coordinates executive workflows and facilitates strategic alignment across the leadership team. Brennan manages the integration of corporate initiatives, ensuring that the production of explosives and blasting systems remains synchronized with organizational priorities. The Chief of Staff optimizes communication channels between the C-suite and operational departments to streamline decision-making processes. By overseeing high-level projects, Renee Brennan ensures that the company mission regarding sustainable resource mobilization remains central to daily activities. This role involves managing complex administrative frameworks that support the delivery of specialty mining chemicals and digital solutions. Brennan drives organizational agility by identifying bottlenecks and implementing solutions that enhance overall productivity. Through meticulous planning and cross-functional collaboration, the Chief of Staff supports the executive leadership in achieving long-term growth targets, ensuring that all internal operations reflect the high standards expected within the global mining and infrastructure solutions sector.

    John Weiss - Chief Information Officer (North America)

    John Weiss, the Chief Information Officer (North America) at Orica, architects the digital infrastructure required to support mining operations across the North American region. Weiss oversees the implementation of advanced data analytics and software solutions that enhance the efficiency of blasting systems and geotechnical monitoring. The Chief Information Officer (North America) ensures that digital platforms remain secure and scalable, facilitating real-time decision-making for mining clients. By integrating cutting-edge technology into the supply chain, John Weiss drives the digital transformation of resource extraction processes. This role involves collaborating with regional teams to deploy specialized software that improves safety and productivity. Weiss manages the technological roadmap, ensuring that all digital tools align with the broader company mission of sustainable resource mobilization. Through the strategic application of information technology, the Chief Information Officer (North America) optimizes operational performance, providing the necessary digital foundation for the company to lead in the North American mining market.

    Guolin Wang - Vice President & Chief Technology Officer

    Guolin Wang, the Vice President & Chief Technology Officer at Orica, manages the technical engineering standards and product development for blasting systems and specialty chemicals. Wang oversees the research and development of new materials, ensuring that all products meet the highest safety and performance benchmarks. The Vice President & Chief Technology Officer drives the technical strategy, focusing on sustainable manufacturing processes that support the company mission of resource mobilization. By collaborating with engineering teams, Guolin Wang ensures that technical innovations are successfully scaled for global mining operations. This role involves evaluating emerging technologies to maintain a competitive advantage in the infrastructure solutions market. Wang manages the technical roadmap, ensuring that all product developments align with the long-term strategic goals of the organization. Through rigorous technical oversight, the Vice President & Chief Technology Officer ensures that the company continues to deliver high-quality, reliable solutions that address the complex needs of the global mining sector.

    Delphine Cassidy - Chief Communications Officer

    Delphine Cassidy, the Chief Communications Officer at Orica, directs the global brand strategy and stakeholder engagement initiatives. Cassidy manages the narrative surrounding the company mission of sustainable resource mobilization, ensuring that the value of blasting systems and digital solutions is clearly communicated to the market. The Chief Communications Officer oversees internal and external messaging, fostering transparency and trust with investors, clients, and the public. By coordinating communication efforts across international regions, Delphine Cassidy ensures that the corporate identity remains consistent and impactful. This role involves managing reputation and crisis communication, protecting the brand during complex industry shifts. Cassidy drives engagement strategies that highlight the company commitment to safety and innovation in the mining sector. Through strategic storytelling and media relations, the Chief Communications Officer strengthens the market position of the organization, ensuring that all stakeholders understand the vital role the company plays in the global infrastructure and mining landscape.

    Sally Cox - Chief People Officer

    Sally Cox, the Chief People Officer at Orica, manages the human capital strategy, focusing on talent acquisition, development, and organizational culture. Cox oversees the workforce planning required to support the production of explosives, specialty chemicals, and digital mining solutions. The Chief People Officer ensures that the company attracts and retains the expertise necessary to drive innovation and maintain safety standards. By implementing training and development programs, Sally Cox fosters a culture of excellence that aligns with the company mission of sustainable resource mobilization. This role involves managing employee relations and diversity initiatives to create an inclusive environment across global operations. Cox drives performance management systems that reward contributions to the strategic goals of the organization. Through effective leadership of the human resources function, the Chief People Officer ensures that the workforce remains motivated and equipped to meet the evolving demands of the mining and infrastructure solutions industry.

    Frequently Asked Questions Regarding Orica Top Executives and Leadership Team

    Who leads Orica?
    Orica is led by Graeme Liebelt (Chief Executive Officer), along with executives such as Exsa Tacna (Interim Chief Executive Officer) and Christopher Spriggs (Chief Financial Officer).
    Who is part of Orica’s executive team?
    The executive team of Orica includes leaders such as Graeme Liebelt (Chief Executive Officer), Exsa Tacna (Interim Chief Executive Officer), Christopher Spriggs (Chief Financial Officer) and other senior executives.
    How many executives does Orica have?
    Orica has 10 executives leading key business areas.
    What roles are included in Orica’s leadership team?
    The leadership team of Orica includes roles such as Chief Executive Officer, Interim Chief Executive Officer, Chief Financial Officer, Chief Financial Officer, Axis Mining Technology, President, Orica Digital Solutions & Chief Technology Officer.