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, Chair of Fisher & Paykel Healthcare Corporation, 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 Jarden 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 National Infrastructure Funding and Financing Limited s 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 scientist working in; resource management (including water and climate change); health and safety; risk management.

Hannah worked extensively in engineering and construction project management, hazardous substances management and ground water contamination, environmental management in mining, downstream oil and manufacturing.

She has both international and local experience formerly President of the Asia Pacific Region for a global engineering company and member of the global board operating extensively across Australia, Asia and the Pacific.

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

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 wide experience across the infrastructure, property and technology sectors, including large-scale project management, corporate and market strategy, and leadership of large organisations in rapidly changing environments.

Adrian's executive experience includes 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.

Adrian is currently an independent director of Craigs Investment Partners.

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

Adrian is a member of our Nominations and Corporate Governance Commitee, 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 business leader, who has helped companies to drive growth through technology, innovative customer solutions and organisational culture. She current chairs Kiwibank and Vista Group and is an independent director of Xero and Kiwi Group Capital. 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: Commercial experience; large organisation and cultural leadership; AI; data and digitisation; retail and mass market business leadership; risk governance; M&A and capital structure.

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.

Scott Scoullar was appointed a Director of Mercury in September 2026.

Scott is an experienced business leader and director with deep finance, accounting, and commercial expertise across the public and private sectors. He is the CEO of retirement village and aged care operator Summerset Group and serves on the board of both the Retirement Villages Association and the New Zealand Aged Care Association.

His previous experience has included roles as CFO of Summerset Group, Housing New Zealand Corporation, and Inland Revenue. He has also previously served on the audit committee of The Treasury New Zealand, the risk and assurance committee of New Zealand Customs Service, and as a director of Wellington City Mission.

Scott is also a fellow of CPA Australia and a member of ICANZ and INFINZ.

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

Rachel, CNZM, 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 sits on the board of The Warehouse Group, Wellington International Airport and ANZCO Foods. Rachel also chairs Rugby’s Appointments and Remuneration Panel, and acts as an advisor to Movac.

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

Rachel is a member of our People and Performance Committee.

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.