nbn Executive and Leadership Team

July, 2026

Leadership Overview

nbn has 8 executives leading key functions including strategy, operations, technology, and security.

Driven by a commitment to national connectivity, nbn operates as Australia's wholesale broadband provider, building and managing the country's National Broadband Network to enhance digital access and economic opportunity.

Leadership Roles at nbn

  • Chief Executive Officer - Ellie Sweeney
  • Chief of Staff - Matthew Christensen
  • Chief Technology Officer - Guy Scott
  • Engineer - Core Network, Chief Technology Officer - Nina Lioznov
  • Principal Architect & Chief Technology Officer, Network & Systems Nbn Co - Guy Liyanage
  • Manager, Portfolio, Governance & Program Delivery & Chief Technology Officer - Dushy Vithiya
  • Chief Technology Officer, Systems, Simplification & Security - Bradley Peters
  • Interim Executive - Kirsty MacCulloch
  • Ellie Sweeney - Chief Executive Officer

    Ellie Sweeney, the Chief Executive Officer at nbn, directs the overall strategic vision and operational execution for Australia's National Broadband Network. Sweeney guides the corporation's mission to design, build, and operate a wholesale broadband infrastructure, ensuring nationwide digital access. This leadership involves aligning the company's objectives with government mandates and market demands, fostering innovation in network deployment and service delivery. Sweeney oversees all functional areas, driving performance and ensuring the company meets its critical role as the nation's wholesale broadband provider. The focus remains on expanding connectivity and enhancing the digital capabilities across Australia, directly impacting economic growth and social inclusion. Ellie Sweeney ensures the company's long-term sustainability and market leadership in the telecommunications sector.
    Ellie Sweeney

    Matthew Christensen - Chief of Staff

    Matthew Christensen, the Chief of Staff at nbn, provides direct operational and strategic support to the executive leadership team, particularly the Chief Executive Officer. Christensen manages critical cross-functional initiatives and ensures seamless communication and alignment across departments. This role involves overseeing special projects, driving process improvements, and facilitating the execution of strategic priorities. Christensen acts as a key liaison, coordinating efforts to optimize operational efficiency and support the company's mission of building and operating Australia's National Broadband Network. The focus is on enhancing organizational effectiveness and ensuring that nbn's strategic objectives are met with precision and agility. Matthew Christensen's contributions are vital for maintaining the company's operational momentum and strategic focus.

    Guy Scott - Chief Technology Officer

    Guy Scott, the Chief Technology Officer at nbn, architects and oversees the technological roadmap for Australia's National Broadband Network. Scott directs the design, development, and implementation of advanced network infrastructure, ensuring scalability, reliability, and performance. This leadership role involves managing the core network operations and driving technological innovation to meet the evolving demands of wholesale broadband services. Scott's responsibilities extend to ensuring the security and integrity of the network, safeguarding critical data and infrastructure. The focus is on leveraging cutting-edge technology to enhance the user experience and expand network reach across Australia. Guy Scott's expertise is crucial for maintaining nbn's technological advantage and fulfilling its mandate as the nation's wholesale broadband provider.

    Nina Lioznov - Engineer - Core Network, Chief Technology Officer

    Nina Lioznov, the Engineer - Core Network, Chief Technology Officer at nbn, focuses on the intricate engineering and operational aspects of the core network infrastructure. Lioznov drives the technical integrity and performance of the central components of Australia's National Broadband Network, ensuring robust connectivity. This role involves detailed analysis, design, and optimization of core network systems to support wholesale broadband services. Lioznov's expertise is critical for maintaining network stability and implementing technological advancements that enhance service delivery across the nation. The objective is to ensure the core network functions with maximum efficiency and reliability, supporting nbn's mission. Nina Lioznov's technical contributions are fundamental to the network's operational success.

    Guy Liyanage - Principal Architect & Chief Technology Officer, Network & Systems Nbn Co

    Guy Liyanage, the Principal Architect & Chief Technology Officer, Network & Systems Nbn Co at nbn, defines the architectural blueprint for the company's network and systems. Liyanage leads the strategic design and evolution of nbn's technological framework, ensuring it aligns with future demands and operational excellence. This position involves setting the technical direction for network infrastructure and integrated systems, crucial for delivering wholesale broadband services nationwide. Liyanage's role emphasizes innovation in architecture to support scalability and resilience. The focus is on creating robust, future-proof systems that underpin Australia's digital future. Guy Liyanage's architectural vision is essential for the sustained growth and technological advancement of the National Broadband Network.

    Dushy Vithiya - Manager, Portfolio, Governance & Program Delivery & Chief Technology Officer

    Dushy Vithiya, the Manager, Portfolio, Governance & Program Delivery & Chief Technology Officer at nbn, oversees the strategic management of technology programs and governance frameworks. Vithiya ensures that nbn's technology initiatives are aligned with corporate objectives and delivered efficiently across Australia. This role integrates portfolio management, governance protocols, and program delivery to optimize the execution of the National Broadband Network build and operations. Vithiya's focus is on establishing robust processes that support technological advancement and ensure accountability. The objective is to drive successful program outcomes and maintain high standards of governance within the technology division. Dushy Vithiya's leadership is key to the effective implementation of nbn's technology strategy.

    Bradley Peters - Chief Technology Officer, Systems, Simplification & Security

    Bradley Peters, the Chief Technology Officer, Systems, Simplification & Security at nbn, spearheads the strategic direction for the company's technology systems, focusing on streamlining operations and enhancing security. Peters directs efforts to simplify complex technological architectures, improving efficiency and user experience for wholesale broadband services across Australia. This leadership role is critical for fortifying the network's security posture against evolving threats, ensuring the integrity and reliability of nbn's infrastructure. Peters drives initiatives that reduce complexity, enabling faster deployment and more effective management of network systems. The ultimate goal is to create a more agile, secure, and user-friendly technological foundation for the National Broadband Network. Bradley Peters's focus on simplification and security is vital for nbn's operational resilience.

    Kirsty MacCulloch - Interim Executive

    Kirsty MacCulloch, the Interim Executive at nbn, provides critical leadership during a transitional period, ensuring continuity and strategic momentum for the organization. MacCulloch supports the ongoing mission to build and operate Australia's National Broadband Network, overseeing key functions and driving operational objectives. This role involves navigating immediate challenges and opportunities, maintaining focus on the company's core responsibilities as a wholesale broadband provider. MacCulloch's leadership ensures that critical projects and day-to-day operations continue without disruption, supporting the national rollout of broadband services. The focus remains on upholding nbn's commitment to enhancing digital connectivity across Australia. Kirsty MacCulloch's interim leadership provides stability and direction.

    Frequently Asked Questions Regarding nbn Top Executives and Leadership Team

    Who leads nbn?
    nbn is led by Ellie Sweeney (Chief Executive Officer), along with executives such as Matthew Christensen (Chief of Staff) and Guy Scott (Chief Technology Officer).
    Who is part of nbn’s executive team?
    The executive team of nbn includes leaders such as Ellie Sweeney (Chief Executive Officer), Matthew Christensen (Chief of Staff), Guy Scott (Chief Technology Officer) and other senior executives.
    How many executives does nbn have?
    nbn has 8 executives leading key business areas.
    What roles are included in nbn’s leadership team?
    The leadership team of nbn includes roles such as Chief Executive Officer, Chief of Staff, Chief Technology Officer, Engineer - Core Network, Chief Technology Officer, Principal Architect & Chief Technology Officer, Network & Systems Nbn Co.