Board of directors

As a State Owned Enterprise, Transpower’s Board is appointed by its shareholder – the New Zealand Government.

Tony Ryall


Tony is Chairman of nib NZ Limited and nib NZ Holdings Limited, is trustee of the Massey University Foundation and is currently the Head of Public Policy at Simpson Grierson.

Prior to joining the firm, Tony had a distinguished career in public service as a Member of Parliament from 1990 to 2014. As a senior minister in the Government, Tony held a number of portfolios: Minister of Health, Minister of State Owned Enterprises, Minister of State Services. He also held other ministerial positions between 1997 and 1999. In the role of Minister of State Owned Enterprises he was involved in the split of the Electricity Corporation of New Zealand (ECNZ) and the establishment and later partial sell-down of gentailers Genesis, Meridian and Mighty River Power. Tony was Shareholding Minister for Transpower from 1997-1999 and 2011-2014.  

Tony holds a Bachelor of Business Studies degree from Massey University, and became a Companion of the New Zealand Order of Merit in the 2015 New Year Queen’s Honours for services as a Member of Parliament.


Pip Dunphy

Deputy chair

Pip has worked as a non-executive director for the last 8 years. Recent governance roles include a diverse range of industries and companies including Auckland Transport, NZ Post and ACC. Pip is Chair of First Gas Holdings TopCo Limited (and subsidiary companies) and Gas Services NZ Limited (and subsidiary companies), and Deputy Chair of Abano Healthcare Limited. Current directorships include Chubb Insurance New Zealand Limited, Fonterra Shareholders Fund, NZ Superannuation Fund and Tamaki Research Limited. She is also a trustee at Ngahere Trust, and an advisor at NEXT.

Prior work experience and knowledge includes over 20 years in the areas of capital markets, banking, finance and investment management. Pip holds a degree in Horticultural Science from Lincoln University. She is a Chartered Financial Analyst from the CFA Institute USA. 


Professor Jan Evans-Freeman

Jan is the Pro-Vice-Chancellor of Engineering at the University of Canterbury, and specialises in engineering and technology.  Before moving to New Zealand in 2009, Jan was the head of engineering at Sheffield Hallam University in the UK.  She is currently a Director of the Wireless Research Institute, the Electric Power Engineering Centre and the University of Canterbury Quake Centre. She is also a member of IPENZ governing board, and has served on many UK government advisory and funding panels. She is a Fellow of the Institute of Professional Engineers (FIPENZ) and a Fellow of the Institute of Physics (UK).

Jan has a PhD in electronic engineering from Manchester University. Jan's research has concentrated around looking at defects in semiconductors for engineering applications, and the development of novel materials for light-emitting devices. She led many significant research projects in Europe on these topics before coming to New Zealand.

Bill Osborne

Bill is Director of Rangitira Services Limited and Ports of Auckland Limited. He is also Vice President of New Zealand Rugby Union Incorporate.

Previous experience includes being group manager of New Zealand Post, CEO of Quotable Value, inaugural Chair of 2 Degrees mobile, and being Chair of CoreLogic New Zealand.

Bill is of Te Atihaunui descent (Whanganui area) and has committed much time to Maori development over the years. He has served on the Maori Economic Development Commission and was responsible for establishing Te Huarahi Tika Trust, a pan Maori trust handling Maori interests in Radio Spectrum.  He also chaired Hautaki Limited, the commercial arm of the Trust.

Bill has also served on the NZ Maori Rugby Board and played 48 games for the All Blacks from 1975 to 1982.


Dean Carroll

Dean Carroll has over 30 years energy industry experience in New Zealand and internationally, most recently as CEO and Director of Lumo Energy Australia, Infratil Energy Australia and related companies. Dean held a number of senior executive roles at Genesis Energy and worked for ECNZ. He has also been a Director of Energy Online, Direct Connect Australia and the Energy Retailers Association of Australia, and served on the New Zealand Electricity Market Rules Committee. Dean has previously worked in the oil and gas sector in Canada and New Zealand for Fletcher Challenge Petroleum and earlier for Shell Oil NZ.   


Sheridan Broadbent

Sheridan Broadbent has been working in executive and governance roles in the infrastructure, technology and energy sectors for over 20 years. Most recently, she was Chief Executive of lines company Counties Power. Sheridan is on the Board of Kordia Group, the New Zealand Business Leaders’ Health and Safety Forum, the Chair of the advisory board to UMS NZ Limited, and is Chair of data analytics start-up Ampli Limited.

A chartered director, Sheridan is an inaugural graduate of the IOD’s Future Directors programme, of which Transpower is an active current participant.