GARTH DIBLEY - Chief Executive

With extensive experience in the generation, retail, transmission, and distribution sectors of New Zealand’s electricity industry Garth  took up the position of Chief Executive at WEL Networks in September 2014. He previously held leadership roles at both Transpower and Meridian Energy. Appointed as General Manager Grid Performance at Transpower in 2010, he led operations and asset maintenance functions of the national grid. Prior to this, he was based at Meridian Energy, working as General Manager Markets and Production and then General Manager External Relations.

Garth has a Bachelor of Engineering (Mechanical) from the University of Canterbury and an MBA from Waikato University. He has completed executive training programmes at Kellogg and INSEAD business schools of management.

Julian Lonsdale - Chief Technology Officer

Julian has 25 years' experience across a broad range of senior IS/ICT design, delivery and management roles locally within Skycity, Spark and IBM NZ, and internationally with IBM India, CSC UK and British Telecom.  He enjoys delivering new IT systems and technology in partnership with the relevant business teams to deliver exciting new services and changes to existing services.  Julian joined the WEL team in June 2019 where he'll use his broad experience of delivering new products and services to support WEL's continuous improvement in IS/ICT delivery practices.


With a solid career in the electrical industry Mat brings a strong analytical and practical engineering skill set to his management role.  In 1992, he completed his electrical apprenticeship with Waitaki Power Ltd and then went on to graduate from the University of Canterbury with a Masters Degree in electrical engineering in 2001.

He began working at Genesis Energy's Huntly Power Station from 2001 to 2012, followed by two years at Delta Utility Services in Dunedin.  Joining the WEL Networks team in 2014, he has held the roles of Asset Planning and Engineering Manager, WEL Services General Manager for two years before moving into his current position


Michelle joined WEL in 2013 and has had various managerial roles within the business including billing, pricing, revenue and regulatory. Michelle brings strong commercial and analytical skills to her role with experience in central and local government and also within the competitive business sector. Managing the Revenue, Legal and Business Development Solutions functions, Michelle has responsibility for strategic planning and regulatory management. She has a Bachelor of Management Studies from the University of Waikato.


vicky costain - General Manager People & Performance

Vicky joined WEL Networks in 1998 and has held a number of roles within the organisation; from leading the risk, insurance, business continuity and internal audit functions through to her current role managing the Human Resources, Organisation Development, Health and Safety and Communication units.  She is responsible for ensuring these core business functions align with and support WEL’s business strategy, culture and values. Vicky has a Bachelor of Arts degree and a Post Graduate Certificate in Management Studies from the University of Waikato.


david barnett - chief financial officer

David has been with WEL since April 2019 as the Group Treasurer before moving into the Chief Financial Officer role in September 2019. David has close to 30 years’ experience across a range of industries and companies including Transpower, Vector and more recently the ANZ Bank.




With over 28 years’ experience in the utility sector, working in Electricity Distribution, Transmission and Telecommunications infrastructure, George Pirie has joined WEL as General Manager of WEL Services.

Originally from Scotland, George started his career in Distribution as a Line Mechanic and moved to New Zealand with his family in 2007. Working initially for Electrix as Contracts Manager and then BBUGL, George has joined WEL directly from Connect 8 Ltd, an infrastructure company, where he was part of the senior management team.

George joined the WEL team in October 2019 and will oversee WEL’s Field Delivery and Business Services.




Kerry joined WEL in 2013 after an aviation career in the RNZAF followed by the commercial airline industry.  Having developed a passion for planning and delivering maintenance and engineering requirements to satisfy the demands of a busy airline, Kerry was engaged to establish a reliability programme for the airline and manage gas turbine engine repairs and overhauls.

A new direction was sought and upon completion of a Master of Business Administration at the University of Waikato, Kerry was employed by WEL in the works programme space responsible for customer engagement, design, planning and scheduling and ultimately the complete delivery of the Annual Works Plan. His new role leads a team focussed on new energy solutions.




Sally joined WEL in 2021 and has held a number of senior positions in large companies including Fonterra and LIC. Sally started her working life in the civil and construction sector with an engineering cadetship and later progressed into quantity surveying and project management.

Sally holds a PGDip in Management from Waikato University and is completing a Master of Arts in March 2021.

Prior to joining WEL Sally worked in the waste to energy sector in a start-up company. With extensive experience in the commercial sector and competitive construction market, Sally is looking forward to supporting the Works Programme team in achieving its goals as WEL continues to move into the new era innovation in energy.