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AndyLester 2017


Andy Lester


Andy was appointed Chief Executive of MainPower in November 2017. He has experience in senior leadership roles across a diverse range of sectors including infrastructure, technology, manufacturing and agriculture. Andy is passionate about developing high achieving teams with a particular focus on customer and culture outcomes. Importantly, he is a leader focussed on safety. 

Connect with Andy via LinkedIn.   

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Mark Appleman

BE (HONS) (Electrical)


Mark joined MainPower in 2016, bringing with him over 15 years of experience managing commercial, infrastructure, operations and project delivery teams within high risk environments. A qualified engineer, Mark has spent the past four years as the Electrical Systems and Energy Manager at Perth Airport in Australia. Before this he held a number of engineering and management roles across New Zealand.

Connect with Mark via LinkedIn

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Craig Beikoff


Craig joined MainPower in 2016. He has over 20 years' of extensive domestic and international experience, covering the resources, infrastructure, construction, high-risk industrial services, chemical processing, utilities, and manufacturing industry sectors. Craig's team is responsible for MainPower's strategic vision for leadership in health and safety. 

Connect with Craig via LinkedIn

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Geoff Gale


Geoff joined MainPower in 2016. He has nearly a decade's worth of experience in senior management and a proven track record of leading teams to success. Geoff is responsible for providing the strategic, project and infrastructure leadership at MainPower while driving best practice and ensuring that customer service is exceptional. 

Connect with Geoff via LinkedIn



Sandra O'Donohue

BA (Psych), PGDipOSH, PGDipHRM, MBS (HRM), MMgt (Dispute Resolution)

Sandra has been part of the Executive Leadership within MainPower since 2011, responsible for MainPower’s Human Resources team that delivers an employment environment with adequate people resource and capability to achieve the company’s business goals. This includes recruitment and selection, induction, performance management, and remuneration of the company’s varied workforce. Sandra has held senior management roles at Fairfax NZ Limited, Solid Energy and the Canterbury Rugby Football Union.

Connect with Sandra via LinkedIn



Mark Williamson


Mark joined MainPower in the role of Commercial Manager in 2016. He has extensive experience gained from a 20+ year business career that has included positions in manufacturing, retail, sales operations, general management and business transformation.

Connect with Mark via LinkedIn

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Rob Wilson


Rob joined MainPower in 2016 from Easysteel, a member of the Fletcher Building Group. Rob has spent six years in various roles within Waste Management NZ following a career in the NZ Army as an Officer in the Royal New Zealand Engineers. Rob is responsible for driving the operational vision of MainPower and leads delivery of customer service excellence through increasing operational productivity and improving outcomes to the customer.

Connect with Rob via LinkedIn



Warren Wright


Warren has held the role of Finance Manager with MainPower since 1987. His team is responsible for organising the financial and accounting affairs of the company including the preparation and presentation of annual accounts and the provision of financial information and strategic advice to managers to assist with ongoing decision making. Warren is a Member of the Institute of Chartered Accounts, Society of Corporate Treasurers and Institute of Finance Professionals.