DELTA - Key Persons


Amelia Jones

Job Titles:
  • Head of Brand and Communications
Amelia (BCom, BA) joined Delta in March 2016 and was appointed Head of Brand and Communications in January 2024. She is responsible for the delivery of brand, marketing, and communication strategies across the business. Amelia is well-versed in solution-oriented B2B marketing, corporate communications including crisis management, and has taken a lead role in Delta's strategic development. Amelia has a focus on promoting business resilience to ensure sustained success in the dynamic and competitive markets in which we operate.

Daryl Putt

Job Titles:
  • Business Accountant
Daryl (BCom, Dip Grad, CA) joined Delta's predecessor Dunedin Electricity Ltd in July 1997. He is responsible for ensuring accurate and robust management accounting practises as well as effective and efficient business processes. Daryl has held a number of roles within the finance group at Delta, gaining a wide range of experience within the contracting and energy sectors, which began over 25 years ago at Taranaki Energy Ltd. He undertook his tertiary education part time, while also working full time at Delta and gained his Chartered Accountant qualification in 2007.

Jane George

Job Titles:
  • Member of the Board
  • Non - Executive Director
Jane George (MBA (Cranfield, UK), FRICS, BSc) joined the Delta Board in November 2021. She has experience working in the construction and infrastructure sectors delivering major projects both in New Zealand and internationally. She was a Project Director for Beca Limited and led the consulting project delivery and strategy team in Christchurch, until she relocated to Otago in 2016. She currently sits on the Boards of Invercargill Airport Limited and A.G. Foleys Limited as an independent director and runs her own niche consultancy practice.

Jolene Lynn

Job Titles:
  • Executive Assistant
  • Member of the Leadership Team
Jolene joined Delta in June 2020 as Executive Assistant to the CEO. Jolene is responsible for executive, administrative and management support to the CEO and Board of Directors. Jolene has previously worked in a variety of administrative and management support roles for organisations within the infrastructure and healthcare sectors.

Josh Butterfield

Job Titles:
  • General Manager Metering and Field Operations
Josh (MBA MCPM BA) joined Delta in December 2021. He is responsible for the delivery of our metering and field service operations at Delta. His business unit spans across all New Zealand networks and provides services to a wide range of electricity retailers and meter owners. Originally from the United States, Josh started his career with Sprint Corporation and, since arriving in New Zealand in 2005, has gained extensive experience in the telecommunication and electricity sectors. He has held management positions with Telecom, Mercury NZ, Vector, Prysmian NZ, The Lines Company, and Influx Energy Data.

Jude Molyneux

Job Titles:
  • ICT Operations and Change Manager
Jude (BAgEcon, Prince2) joined Delta in January 2019 as the Change Manager, moving into her current role in October 2023. Jude is responsible for all ICT operations, change management and process improvements across the company's systems and operations, which support innovation and foster efficiency. Jude has over 35 years of experience in the ICT sector in both New Zealand and the United Kingdom, working in a variety of operational and management roles across many industries, including Finance, Transportation and Education.

Louisa Homersham - CFO

Job Titles:
  • Chief Financial Officer
  • Member of the Leadership Team
Louisa (NDA, CA) joined Delta in March 2023. She has a wide variety of experience as a senior finance executive, business advisor, strategic partner and qualified Chartered Accountant. She has previously worked in senior management roles at Aurora Energy and Otago Polytechnic (Tē Pukenga). Prior to this Louisa was an Associate Director at Deloitte Dunedin. Louisa has a focus on continuous improvement, performance excellence and business transformation. She also has governance experience and is on the Board of the Otago Medical Research Foundation, an organisation that provides funding for medical research in Otago.

Matt Sadgrove

Job Titles:
  • HSEQ Manager
Matt (PGDipHlth, Grad NZISM) joined Delta in July 2014. He is responsible for the health and safety operation of our business. Matt has a wide range of experience and has been a health and safety specialist for over 10 years. Previously, Matt held production and safety roles at Silver Fern Farms, as well as a variety of roles outside the industry. Matt is an active member of the New Zealand Institute of Safety Management and the Electricity Distribution Institute Safety forum.

Michael Price

Job Titles:
  • Member of the Leadership Team
  • General Manager Power and Communication Services
Michael (MBA, NZCE Electrical, REA, MInstD) joined Delta in March 2017. He is responsible for the delivery of contracting services to our electrical and communication customers. Michael has nearly 40 years of operational experience, predominantly within the electricity distribution sector, but also across other industries. He has held senior management roles at PowerNet, United Networks, NZ Post and most recently the Earthquake Commission (EQC).

Mike Costelloe - CEO

Job Titles:
  • Chief Executive Officer
  • Member of the Leadership Team
Mike joined Delta in June 2017. He has wide experience in the highly competitive contracting sector, predominantly in civil infrastructure. Mike has previously held a number of senior management roles, in both New Zealand and Australia. Since January 2015, Mike has been General Manager, Strategic Accounts Downer New Zealand. Prior to that, he was General Manager Otago/Southland Downer New Zealand.

Peter Carnahan

Job Titles:
  • Member of the Board
  • Non - Executive Chair
Peter Carnahan (BCom, FCA, CFInstD) joined the Delta board in August 2022 and was appointed Chair in October 2022. Peter is a Chartered Accountant who was in Public Practice in Invercargill before moving into executive roles with large privately owned family businesses that have diversified interests across the country. Peter has also been appointed a director and chair of companies across a range of sectors including previously Corde Ltd owned by the Selwyn District Council and currently Invercargill City Holdings Ltd. Peter has a BCom from the University of Otago is a Fellow of Chartered Accountants Australia New Zealand and a Fellow of the Institute of Directors.

Richard King

Job Titles:
  • General Manager
Richard (BAppMgt, Nat. Cert. Sports Turf Mgt) joined Delta in 2001 and was appointed General Manager Greenspace Services in 2015. He is responsible for Delta's delivery of greenspace services, including sports turf management, ecological and horticultural services, roadside vegetation control, tree services, and park and reserve maintenance, for local government and private sector customers. Richard has over 35 years' experience in greenspace services, primarily in the amenity horticulture and sport turf industries. He leads a highly skilled team of over 240 people during peak seasons, across ten locations throughout the South Island.

Shane Spicer

Job Titles:
  • Commercial Manager
Shane (NZCQS, PMP, NZC Const. Man. L5) joined Delta in December 2012 as the Technical Services Manager. In 2016 Shane moved into the Commercial Manager role with responsibilities in the risk and quality assurance portfolios, as well as leading the newly created Major Project Group. Shane started in the high voltage Transmission and Generation industry. He has held a number of senior roles, including Regional Manager for the then, Transfield Services, and Senior Projects Manager for a large multinational company, where he was responsible for tendering and managing major infrastructure renewals and upgrades across New Zealand.

Steven Grave

Job Titles:
  • Member of the Board
  • Non - Executive Director
Steven Grave joined the Delta Board in July 2017. He is a professional engineer with more than 35 years' experience in civil engineering and 21 years' experience in the contracting industry. Previously Steven has held a senior leadership role with Fulton Hogan. Currently he owns his own consulting practice and is on the board of Whitestone Contracting, SICON and Buller Holdings.

Tony Allison

Job Titles:
  • Member of the Board
  • Non - Executive Director
Tony Allison (BCom, BA, CA, CM.Inst.D) joined the Delta Board in November 2017. He is an experienced chief executive with a long working history in finance and the retail industry. Previous roles have included Finance Director of a London law firm and Chief Operating Officer at Calder Stewart Industries. He is currently the chief executive of Smiths City and a board director of the Dunedin International Airport. Tony has a BCom and BA from the University of Otago and is both a Chartered Accountant and Chartered Member of the Institute of Directors.