Knowledge is our strength

Knowledge is our strength
Our geothermal competence and associated network have developed over several decades. The team has broad experience in energy systems based on geothermal energy and extensive experience from the oil and gas industry.
Our team
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Thor Erik Musæus, CEO
More than 30 years of experience with business and project development nationally and internationally with a particular focus on geothermal energy. Led the team that established the Nordics' first deep energy wells at Oslo Airport.
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Bjørn Ståle Tennfjord, CFO
Experienced economics and finance manager with more than 30 years' background from the energy industry, the last few years from geothermal. Similar experience from wind power and the oil industry in the past.
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Sjur Talstad, COO
30 years' experience from top management jobs and technical positions in the oil industry. The last few years from the renewable industry with the development and delivery of geothermal energy systems.
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Gaute Øksne, Project Manager
Project management and contracting activities, extensive experience from geoenergy and energy well drilling. Led the project department in a drilling company and delivered a large number of well parks geographically spread across Norway. Worked with different drilling technologies for 15 years.
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Bjørn Inge Tønnessen, Executive Chair
More than 35 years of experience from the energy industry, with a focus on renewable energy in recent years (geothermal, hydrogen, etc.); before that active in the finance and oil industry. Has established several companies in the same sectors. Chairman of Oslo listed Questerre Energy.
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Pål Jarness, Consultant & Board Member
Broad and solid experience from leading positions in finance and operations with a range of industrial and PE-owned businesses.
Our shareholders
Founders and management team

GTML was founded in 2019 by Thor Erik Musæus, Bjørn Ståle Tennfjord, Pål Jarness, Sjur Talstad and Bjørn Inge Tønnessen. The founders have broad experience from geothermal energy development and the oil and gas industry.
Board members
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Bjørn Inge Tønnessen, Executive Chair
35 years of experience from the oil & gas and financial markets sectors. Founder and CEO of Spike Exploration & Edge Petroleum. Chairman of Oslo listed Questerre Energy.
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Tom Nysted, Board Member
Extensive management experience from industrial and commercial executive positions in several industries, including 13 years as CEO of Agder Energi. Deep insight into energy markets and the ongoing changes.
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Pål Jarness, Board Member
Broad and solid experience from leading positions in finance and operations with a range of industrial and PE-owned businesses.
Code of conduct
Our Code of Conduct governs our expectations and requirements for ethical practices in our business.