About Us

Our Executive Leadership Team

Christian Lange

Chief Executive Officer

Christian is a highly accomplished executive with over 30 years of experience in the global resources industry, encompassing both Australian and international markets.

 

His extensive career includes a notable 18-year tenure at Schlumberger, where he held senior executive and operational roles across diverse regions, including Australia/NZ, the Middle East, the United Kingdom, Venezuela, and the USA.

 

As the former Managing Director and CEO of ASX-listed Neptune Marine Services, Christian played a pivotal role in transforming the company from a nascent technology startup into a major player with over 700 employees and operations spanning key offshore regions in Australia, the UK, Asia, and the USA. He further demonstrated his entrepreneurial spirit as the Founder and Managing Director of Condor Energy Services and Griffin Energy Solutions, where he led these firms in well intervention services and specialist well engineering and project management.

 

Christian holds an MBA (with Distinction) from the Curtin University Graduate School of Business.

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Kath Lange

Chief Operating Officer

Kath has 21 years of experience in the upstream oil and gas industry, demonstrating exceptional leadership and strategic management across both operators and service companies. Her career includes a significant 16-year tenure at ExxonMobil, where she led critical operations on the Gorgon Project as the Jansz-Op Work Operator Manager. In her recent role at Griffin Energy Solutions, Kath has been instrumental in managing Well Intervention Programs, overseeing tendering processes, and handling contracts.

 

Kath's broad expertise spans offshore facilities, reservoir engineering, HSE, regulatory compliance, and operational management. Her ability to navigate complex joint venture relations and agreements showcases her strategic acumen and capacity for driving business value through operational excellence.

 

Kath holds a Bachelor of Chemical Engineering and Commerce from The University of Melbourne.

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Tracy King

Chief Financial Officer

Tracy is a senior executive and Chartered Accountant with extensive experience across logistics, workforce management, utilities, and professional services. Tracy has a proven track record in driving business growth through both organic expansion and strategic M&A, with a strong focus on integration and value creation.

 

Formerly, as the Group Head of Strategy at ASX-listed PeopleIN, Tracy oversaw enterprise strategy, M&A, investor relations, and government relations. She has held senior roles in ASX-listed companies and government-owned corporations, with broad commercial experience across finance, M&A, customer account management, strategic procurement, supply chain optimisation and business process improvement.

 

A collaborative and results-driven leader, Tracy is passionate about continuous improvement and scaling businesses for long-term success. She holds an Executive Education qualification from Harvard Business School, a Graduate Diploma in Applied Finance, a Graduate Diploma in Chartered Accounting and a Bachelor of Commerce from The University of Queensland.

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Andrew Robertson

General Manager – Operations
Andrew has over 40 years of global experience in the energy sector with BP, BG/QGC, and Shell, in various leadership roles. Before joining ADZ Energy, he consulted for CC Energy in Oman with their senior leadership re-organisation. At BG/QGC, Andrew managed upstream business operations and assets in Queensland, and at BP, he oversaw the pre operations of the world's largest twin-deck platform in Azerbaijan, in the North Sea he served as Offshore Installation Manager and Technical Authority. Andrew brings extensive practical and pragmatic operational leadership experience to ADZ Energy.
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Robin O’Leary

General Manager – Exploration & Portfolio
Robin has 25 years as an oil and gas professional leading E&D programs across both onshore and offshore Australia and Internationally (New Zealand, East Timor, Vietnam, and Kenya) with a track record of discoveries, project delivery and strategy execution. Robin has held exploration management roles with Origin Energy, Beach Energy, Timor Resources, Armour Energy and now ADZ Energy. He has also held technical advisory roles supporting Australian Petroleum Production and Exploration Association, the Queensland Resources Council and Geoscience Australia.
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Wayne Richards

General Manager – Projects
Wayne has 27 years of experience in the oil and gas industry including 15 years during the ramp up of the CSG sector. His expertise includes operations, commissioning, and project management via various FIFO assignments across Australia. Wayne's leadership and organisational skills are well-regarded, particularly in contracts, project management, and petroleum infrastructure. Notably, Wayne worked with Origin Energy in key roles in the APLNG project including Well Commissioning Manager and Well Services Manager. At ADZ Energy, Wayne oversees the Surat Basin capital works program. Wayne holds a Bachelor of Applied Science from The University of Queensland.
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Edith Lagendijk

General Manager – Subsurface
Edith has over 25 years’ global experience in the energy sector, working for Shell, ConocoPhillips, Woodside and Arrow Energy in various leadership roles. Prior to ADZ Energy Edith was consulting, providing specialist technical advice in the areas of reservoir evaluation, field development planning, project reviews and technical assurance. At Shell Edith worked in key front end development planning and new business development roles. Back in Australia she worked in various Subsurface management positions, as discipline lead and providing technical assurance on Shell’s QCLNG Project. Edith graduated from Cambridge University with a MA Honours in Engineering and a MEng in Petroleum Engineering and MBA with Distinction from Herriot Watt University, United Kingdom.
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Stephanie Oppermann

HR Manager

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