Scott St John was appointed a Director of Mercury in September 2017 and Chair of the Board in January 2024.

Scott has an extensive background in investment advisory and capital markets. Scott is Chair of ANZ Bank New Zealand and a director of the ANZ Group and Next Foundation. He was formerly a director of Fonterra Cooperative Group, a member of the Capital Markets Development Taskforce and the Financial Markets Authority Establishment Board and was Chancellor of the University of Auckland. He was the Chief Executive of First NZ Capital from 2002 to 2017.

Key Skills: M&A and capital structure; stakeholder relationships; commercial experience; people leadership.

Scott is the Chair of our Nominations and Corporate Governance Committee, a member of our People and Performance Committee, Audit & Financial Risk Committee and Safety & Enterprise Risk Committee by virtue of his position as Board Chair. 

Mark Binns was appointed a Director of Mercury in September 2023.

Mark was CEO of Meridian Energy from 2012 – 2017 and before that spent 22 years with Fletcher Building, including 15 years as CEO of the Construction and Infrastructure division. He currently chairs Crown Infrastructure Partners and Hynds Limited and is a director of Auckland International Airport.

Key Skills: Energy industry; wholesale markets trading; commercial experience; major project investment.

Mark is a member of our Safety and Enterprise Risk Committee. 

Rob Hamilton was appointed a Director of Mercury in April 2025. 

Rob is an experienced business leader and director and an experienced chair of audit and risk committees. He is currently a director of Westpac New Zealand, Oceania Healthcare, Tourism Holdings and Cyprus Enterprises. Rob has more than three decades’ experience in finance and capital markets, including as a Managing Director and Head of Investment Banking at Jarden, and Chief Financial Officer for SkyCity Entertainment Group. Rob’s experience includes advising several major New Zealand energy companies.

Key Skills: M&A and capital structure; investment analysis; audit and risk management; commercial experience.

Rob is the chair of our Audit and Financial Risk Committee.  

Hannah Hamling was appointed a Director of Mercury in February 2020. 

Hannah is an environmental scientist with a particular interest in sustainable development and resilience. Until January 2020, she was President of the Asia Pacific Region and Global Sustainable Development Leader for Golder, a Canadian global ground engineering and environmental science company. Before joining Golder, Hannah was Managing Director of New Zealand environmental consultancy firm Kingett Mitchell. Hannah has extensive background in consulting, management and board roles across various sectors including electricity, construction and water management.

Key Skills: Natural resource management (including water and climate change); health & safety; risk management.

Hannah is the chair of our Safety & Enterprise Risk Committee and a member of our Audit and Financial Risk Committee. 

Adrian Littlewood was appointed a Director of Mercury in August 2023.

Adrian has deep executive experience including 12 years at Auckland International Airport, nine of these as CEO. Before that he held senior roles across strategy, operations, product and marketing with Telecom New Zealand. Previous governance roles include acting as the New Zealand Chair of the Australia/New Zealand Leadership Forum, Chair of the NZ Airports Association and a director of North Queensland Airports and Tourism Industry Aotearoa.

Key Skills: Commercial experience; large organisation and cultural leadership experience; major project investment; stakeholder relationships.

Adrian is a member of our People and Performance Committee, and a member of our Safety and Enterprise Risk Committee.

Susan Peterson was appointed a Director of Mercury in September 2022. 

Susan is an experienced non-executive director, board chair and chair of People and Remuneration and Audit and Risk Committees. As a business leader, Susan has helped companies to drive growth through technology, innovative customer solutions and organisational culture. She currently chairs Vista Group and is an independent director of Xero. Susan is also an independent director of Craigs Investment Partners.

Susan was previously a member of the New Zealand Markets Disciplinary Tribunal and a past director of Trustpower, ASB Bank, Arvida and Property for Industry. Susan also served on the Board of Global Women and has been a past Ministerial appointee to the National Advisory Council for the Employment of Women.

Key Skills: Large organisation and people leadership; AI; data and digitisation; customer relationships; governance.

Susan is the chair of our People and Performance Committee, a member of our Nominations and Corporate Governance Committee, and a member of our Audit and Financial Risk Committee.

Rachel Taulelei was appointed a Director of Mercury in August 2025.

Rachel is a prominent business leader, and advocate for the Māori economy and values-based business models. She is co-founder of Oho, a business design and brand strategy agency, and was formerly CEO of Kono, a Māori-owned food and beverage company. Rachel was also the North American Trade Commissioner, and founded Yellow Brick Road, a sustainable seafood venture.

Rachel has broad governance experience. She currently chairs Moana New Zealand and is a director of Sealord, The Warehouse Group, Wellington International Airport and ANZCO Foods. Rachel also chairs the Wellington Regional Stadium Trust (Sky Stadium), Fonterra’s Sustainability Panel, and NZRugby’s Appointments and Remuneration Panel.

Key Skills: Iwi and other stakeholder relationships; commercial experience; natural resource management (including water and climate change); governance.

Jasper van Halder was appointed as a Future Director under the Institute of Directors’ Future Directors Programme in December 2025.

Jasper is an executive at Ravensdown, and is the CEO of Agnition, Ravensdown’s corporate venture capital division. He has experience in corporate transformation, innovation and growth across a range of industries, having held senior roles at McKinsey & Company in Australia and New Zealand and as a corporate lawyer in Europe. Jasper also serves on several boards in the private and not-for-profit sectors.

As a Future Director, Jasper is invited to attend Mercury Board and Committee meetings, although he does not participate in decision-making.