BA, MBA

Rebecca Humble is the Chief Executive Officer of Aurizn and brings more than 25 years of senior executive experience in the defence and national security sectors across the US, UK, Europe, and Australia.

Her global career has included roles such as Vice President of Global Strategy for a $17bn defence business based in Washington D.C., Program Director on the $2bn Tornado Military Aircraft Transformation program in the UK, and Head of Global Strategy for BAE Systems’ sustainment business covering the UK, Australia, Nordics, and Saudi Arabia.

Since returning to Australia in 2018, Rebecca has held senior executive roles with BAE Systems and Australian defence companies, and in 2024 was appointed Chief Strategy Officer for QinetiQ’s multinational Australia Sector before stepping into her current role as CEO of Aurizn.

Rebecca is Chair of the Seymour College Board and has also served on the University of Adelaide Defence, Space and Cyber Advisory Board, the Defence Teaming Centre Board and is a Non-Executive Director for Praetorian Aeronautics. She holds an MBA and a Bachelor of Arts in Chinese and Russian history.

LLM (Cantab), LLB (Hons), BCom (Acc), BFin, GDLP, MAICD

Brenton is the Managing Director of Adelaide Airport. He is also on the Adelaide University Business School Industry Advisory Board and Adelaide Festival Board. Before returning to Adelaide, Brenton was Non-Executive Director of Sydney Airport and Hobart Airport and worked with Macquarie in London and Sydney after completing a Masters Degree at Cambridge University. Brenton is also a current Seymour parent.

BA (University of Adelaide), BA Arch (University of Adelaide), BArch St. (UTS), BArch (Hons) (UTS), Registered Architect

Edwina is a registered Architect with over 25 year’s industry experience and expertise in Australia and the UK in the masterplanning, design, delivery, and management of a broad range of large and complex building typologies. She has delivered projects across a diverse range of sectors including health, technology and science,  education, defence, commercial, and residential developments. Edwina is a Principal at global architectural practice Woods Bagot and is their Global Health Sector Leader.

She is the current Chair of the Seymour Infrastructure and Digital Committee, guiding the committee to advise and assist on the College’s building infrastructure pipeline and digital best practice.  Edwina is also the Deputy Chair of the Property Council of Australia’s Social Infrastructure Committee in South Australia.

Edwina is an Old Collegian, (Chief of Clan Douglas ’89) and is a current Seymour parent.

Bachelor of Commerce in Accounting Finance and Systems, Graduate Diploma in Applied Finance and Investments

Stephen Duerden is currently the CEO of Duxton Capital (Australia) Pty Ltd. He has 29 years experience in investment management with 14 of those being involved directly in the agricultural industry in Australia.

Stephen joined the Duxton Group as a founder in May 2009. Prior to this, he was the COO and Director for both the Complex Assets Investment Team and the Singapore operation of Deutsche Bank Asset Management Asia. Stephen is currently a Director of a number of investment funds managed by the Duxton Group and holds board positions on two listed agricultural businesses in Australia.

He holds a Bachelor of Commerce in Accounting Finance and Systems with merit from the University of NSW Australia and a Graduate Diploma in Applied Finance and Investments from the Financial Services Institute of Australasia.

Stephen is a Member of the Australian Institute of Company Directors, a Fellow of the Financial Services Institute of Australasia and a Certified Practicing Accountant. Stephen is also a current Seymour parent.

LLB, BCom, GDLP, MBA, GAICD

Susan has worked at the intersection of the legal and finance sectors in senior roles for over 20 years. Susan is currently the Chief Governance and Risk Officer for RAA and leads the legal, governance, compliance and risk functions and performs the company secretary role. Prior to that time Susan held a number of senior roles at Bendigo and Adelaide Bank and has a demonstrated ability in leading large and diverse teams, with experience in delivering complex organisational changes.

Susan is a member of the South Australian Financing Authority (SAFA) Advisory Board and is Chair of their Risk and Performance Committee. She is also a member of the Women Safety Services SA Board and is Chair of their Governance and Risk Committee. Susan has been a member of the Seymour Finance, Risk and Compliance Committee since 2023 and is a current Seymour parent and Old Collegian (’94) of the College.

Rachel Atkins is a respected leader in philanthropy and social enterprise, with a strong track record in delivering community impact. She is the former Chair of the Sony Foundation Fundraising Advisory Committee (SA), where she led efforts to support adolescents with cancer and the development of a dedicated care centre within SA Health. Rachel co-founded the Mini Miracles Foundation and served on the Board of the Captain Courageous Foundation, demonstrating her deep commitment to social causes.

As Owner/Operator of Fox Gordon Wines and through her work in brand leadership roles with The Cliffs Kangaroo Island and Seafront Group, Rachel brings strong strategic and operational insight. Her experience spans fundraising, marketing, and sustainable enterprise, with a consistent focus on purpose-led initiatives.

Rachel is an Old Collegian (’88) and current parent of Seymour and brings a collaborative and values-driven approach to her role on the Board.

LLB (Hons), B.Comm, GDLP

Phoebe Pitt is a specialist in dispute resolution and risk management, with over 15 years of experience at leading law firms across Australia. A founding member of her firm’s Adelaide office, she currently practises in the Commercial Disputes and Insolvency team at national law firm Mills Oakley.

Phoebe has acted in complex, high-profile litigation in superior courts across the country, representing ASX-listed companies, government bodies and international organisations. She is also a strong advocate for innovation and the advancement of women, having served on national boards focused on women in business, service, and technology. She brings legal acumen, strategic insight and a collaborative mindset – qualities also reflected in her longstanding commitment to arts philanthropy in South Australia.

Phoebe is an Old Collegian (’04) and a current parent.