Defence and National Security

EY works alongside Australia’s Defence and National Security organisations to deliver integrated capabilities, drive strategic transformation, and build a resilient, future-ready force. We empower Defence to modernise, mobilise and deliver by bringing together security-cleared specialists, purpose-built solutions and global alliances. Our teams support Defence in responding to emerging threats, strengthening national resilience, and securing Australia’s interests in a rapidly evolving global environment. 

Contact Us
2159619237

Supporting Australia’s Defence Mission from Strategy to Capability

Defence modernisation demands the right people, equipped with the right capabilities, positioned where they’re needed most—and empowered to deliver mission-critical outcomes.

EY delivers integrated solutions that address the Australian Defence Organisation’s most pressing challenges and strategic priorities—supporting the development of a resilient, agile, and adaptive force. Enabled by global reach, innovative delivery models, and specialised teams, we help Defence realise operational advantage and long-term strategic impact.

As global operations grow more complex and contested, innovation today drives mission success tomorrow. Ultimately, our goal is to help Australia become a leader in defence innovation—one that can adapt quickly, scale effectively, and deliver the capabilities needed to protect national interests in an increasingly contested world.

Defence Supply Chain in Australia: Using industry insight to strengthen our resilience

EY surveyed nearly 500 Australian Defence industry stakeholders to spark discussion on supply chain resilience and security, exploring risks, policy levers, and barriers to sovereign capability.

Read the report
157333728

How EY Delivers for Defence

EY is dedicated to delivering tailored, purpose-built solutions for Defence, with integrated capabilities and a security-cleared, Defence-experienced workforce to address complex challenges. Our alliances with leading Global technology providers bring innovation and speed to capability that drives transformation to deliver mission-critical outcomes for Defence.

Our Defence and National Security Focus

At EY, we leverage data, analytics, and artificial intelligence to empower Defence with informed decision-making and operational excellence, while building resilient supply chains that enhance national security and support Australia’s National Mobilisation strategy. Our commitment extends to implementing enterprise systems and robust infrastructure solutions that safeguard information and streamline processes, enabling Defence to navigate complexities and effectively deliver on Government direction and priorities.

Innovation and Adaption

Supporting Defence to respond to today’s rapidly evolving threat environment with speed and agility is our core focus. We enable more adaptive acquisition strategies and deliver cutting-edge technology at pace — ensuring mission-critical capabilities are deployable when they’re needed most. By embedding innovation into core processes and fostering collaboration across government, industry and international partners, we support Defence in building resilient, future-ready systems that protect Australia’s national interests. 

Scientist at solar thermal research facility

Data and Artificial Intelligence (AI)

We are committed to leveraging and connecting data, analytics, and AI to empower informed decision-making and drive operational excellence for Defence. Our tailored solutions harness the power of advanced technologies to provide actionable insights, enabling Defence to enhance their strategic initiatives and operational efficiency.

1201649930

Enterprise Systems, Cyber Resilience and Secure Cloud

Our teams are dedicated to implementing enterprise systems and cloud solutions that enable and safeguard information, data, applications, and infrastructure for Defence. Our focus on cyber resilience enables Defence with seamless information flow and decision-making while remaining protected against potential threats.

Person pointing at a digital map with radar-like graphics in a futuristic interface.

Secure and Sovereign Supply Chains and National Mobilisation

We work with Defence to build resilient supply chains for the security and sovereignty of Australia. By supporting Australia’s National Mobilisation strategy, we enhance Defence capabilities through effective resource utilisation, and seamless and secure operations in evolving environments.

2151523315

Enabling Infrastructure and Estate

We invest in robust infrastructure solutions that strengthen Defence capabilities to meet the emerging national security requirements of Australia.

Aircraft nose model in a large, well-lit wind tunnel with red safety lights near a large fan.

Productivity, Optimisation and Risk

A focus on streamlining processes, operating models and ways of working, with the right technology and tools to deliver value, innovation and impactful outcomes for Defence. With an enterprise-level risk management approach, we help Defence navigate complexities and uncertainties so they can effectively deliver on Government directives.

1963247168

EY defence insights

Defence Supply Chain Resilience Insights Report

Is the Australian Defence industry ready to meet supply chain challenges on the horizon?

Luke Healy + 1

How reimagining the US submarine industrial base elevates new careers

Purpose, upskilling and coordination are key to the solution to reimagining the submarine industrial base workforce.

Erica Ford + 1

Department of Defense services

EY consulting services for the Department of Defense are backed by 100+ years of global commaercial experience and deep engagement in the public sector.

How advanced analytics enables timely data-driven decisions for the DoD

Helping the Department of Defense harness and evolve the power of analytics to improve mission and business outcomes.

Four actions to modernize military logistics and supply chain security

The U.S. Navy and Department of Defense, with the private sector, can embrace technology and automation in contested military logistics scenarios. Learn how in this article.

How the Performance-to-Plan strategy uses data to modernize operations for the US Navy

Read this case study to learn how the Navy uses the Performance to Plan (P2P) solution to leverage digital leading practices for better operational outcomes.

    The team

    Luke Healy

    Global Defence and Security Leader, EY Australia
    Transformation leadership. Senior executive. Long-term partner.
    Canberra, Australia

    Kim Brennan

    Digital Government Leader, Enterprise Technology Strategy and Implementation, EY Australia
    Olympic gold, silver and bronze medallist. Technology, data and artificial intelligence professional. Collaborator with a passion for connecting diverse perspectives to solve complex problems.
    Canberra, Australia

    Sarah Elphick

    Partner, Business Consulting, EY Australia
    Transformation leader. Collaborator and connector. Champion of women. Mum of two. Lover of good food.
    Canberra, Australia
    Contact our Defence team
    Let’s build a future-ready Defence Force together.

    EY refers to the global organisation, and may refer to one or more, of the member firms of Ernst & Young Global Limited, each of which is a separate legal entity. Ernst & Young Global Limited, a UK company limited by guarantee, does not provide services to clients.