Advokatfirmaet Thommessen AS‘s oil and gas group maintains a steady caseload of M&A within the oil services industry, as well as being active on development projects. Christian Hals heads the group and works closely with listed and private entities on transactions within this space. Pål Lieungh is a leading name for domestic companies acting on international projects, and June Snemyr is a key name for CCS projects. Bendik Christoffersen spearheads the renewable energy and infrastructure department, which is increasingly active on matters arising out of the energy transition. Gunnar Martinsen is a seasoned advisor to domestic and foreign power companies on relevant regulatory frameworks. Snorre Valdimarsson is a key point of contact for a number of the firm’s clients.

Legal 500 Editorial commentary

Accolades

Client satisfaction: Sector knowledge

Client satisfaction: NPS ®

Testimonials

Collated independently by Legal 500 research team.

‘Excellent oversight of all relevant matters, even on truly complex matters. Always available and highly efficient.’
‘Thommessen’s renewable energy team stands out for its exceptional professionalism, deep sector knowledge, and consistent delivery of high-quality legal advice. The team is not only highly responsive and reliable, but also proactive in identifying risks and opportunities, which significantly strengthens our strategic decision-making.’
‘Bendik Christoffersen is a standout partner—highly skilled, commercially sharp, and consistently reliable. His advice is clear, strategic, and always adds value. What sets him apart is his ability to simplify complexity and deliver practical solutions. Working with Bendik and his team is always a smooth and professional experience.’
‘Thommessen's team consists of knowledgeable and service-minded lawyers and specialists. Thommessen's lawyers are very professional, approachable, listen carefully, and provide high-quality advice.’
‘June Snemyr has a deep and wide-ranging knowledge in the energy area, including CCS, offering high-quality legal advice and practical solutions at all times.’
‘The team has extensive expertise in electricity and power supply matters in Norway. They have supported us in negotiating supply agreements and grid connection agreements, and most recently represented us in a significant dispute.’

Key clients

Green Investment Group
Vergia AS/Swiss Life Asset Managers
Eidsiva Energi AS
Lyse AS / Lyse Energi AS
Nordkraft AS
Haugaland Kraft AS
Tonstad Vindpark AS
Zephyr AS
Haram Kraft AS
Lutelandet Energipark AS
Glitre Energi AS/Å Energi AS
Vardar AS

Work highlights

Advised Lyse Produksjon AS on the acquisition of Egersund wind farm from Luxcara, marking the start of the Lyse Group's strategic step into owning, operating and developing onshore wind power.

Advised PolarDC Services on the project development of its data centre project in Drangedal, Norway, including on the financing of the first (and second) phase of the construction, and the acquisition of powered land, grid connection, etc.

Advised Northern Lights JV on its 15-year deal with Swedish district energy provider Stockholm Exergi for the cross-border transport and storage of 900,000 tons of biogenic CO2 emissions annually, starting in 2028.

Lawyers

Hall of Fame: Electricity and renewable energy

The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.