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​HON STEPHEN MULLIGHN GAICD | PRINCIPAL

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  • Strategic, dynamic and outcomes‑driven senior leader with extensive experience across executive roles in the public and private sectors.​

  • Proven record in financial management, economic policy, crisis and risk management, and delivery of large‑scale infrastructure, with demonstrable success in restoring fiscal sustainability and supporting economic growth.​

  • Deep expertise in governance, funds management, and regulated markets, particularly across housing, commercial development, and the defence and space industries.​

  • ​Significant experience in regulated markets, funds management, treasury functions and financial reporting.

  • Highly effective public communicator with substantial media experience and strong stakeholder engagement skills, supported by broad and trusted networks across state and federal governments, industry, and the community.​

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Hon Stephen Mullighan GAICD

LIGHTS

Hon Stephen Mullighan GAICD

LIGHTS

​Highlights

  • Led the state’s economic, budget and financial strategy, overseeing the management of multi‑billion‑dollar public sector finances and investment programs.

  • Positioned South Australia as a leading jurisdiction in defence and space programs, driving investment, jobs, and sovereign capability.

  • Oversaw one of the largest infrastructure programs in the state’s history across road, rail, and public transport, including policy reforms for heavy vehicle access, rideshare regulation, and cycling infrastructure, balancing safety, competition, and community expectations.

  • Provided strategic, financial, and policy advice to Deloitte's public sector and corporate clients on economic development, infrastructure, and organisational performance.

​Key roles

  • Treasurer of South Australia | March 2022 – September 2026

  • Minister for Defence and Space Industries | April 2024 – September 2025

  • Minister for Police | January 2025 – September 2025

  • Minister for Transport and Infrastructure | March 2014 – March 2018

  • Minister for Housing and Urban Development | January 2016 – March 2018

  • Member of the House of Assembly, Parliament of South Australia | Member for Lee | March 2014 – March 2026 | Three consecutive terms.

  • Associate Director, Deloitte | 2010 – 2013

  • Chief of Staff to the Deputy Premier and Treasurer of South Australia | 2007 – 2010

Hon Stephen Mullighan GAICD

LIGHTS

Hon Stephen Mullighan GAICD

LIGHTS

Key speeches

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Qualifications

  • Graduate, Australian Institute of Company Directors (GAICD) Australian Institute of Company Directors | 2026

  • Bachelor of Arts (Public Policy) University of Adelaide | 2001​

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We acknowledge the Kaurna people as the Traditional Owners of the land that our business operates on.

We pay our respects, every day, to Elders past and present and acknowledge that their spiritual relationship with their country is as important today as it ever has been.

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©2026 Mullighan Advisory

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