Advokatfirmaet Thommessen AS has a comprehensive employment offering, allowing the team to advise on employment litigation, advisory services, investigations, whistleblowing, and complex reorganisations. With an office in Stavanger, the firm is equipped to support clients in the oil and energy sectors. Practice head Tron Dalheim is knowledgeable of the oil, energy, and aviation sectors, among others, enabling him to act in complex employment litigation. Stein Kimsås-Otterbech has extensive experience in cases involving changes in senior management. Anders Sundsdal chiefly focuses on redundancy processes, litigation, and transactions, combined with an aptitude in authority investigations and HSE matters. Håkon Berge regularly acts on cases regarding restructuring, workforce reductions, and cross-border employment.

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Accolades

Client satisfaction: Sector knowledge

Client satisfaction: NPS ®

Testimonials

Collated independently by Legal 500 research team.

‘I am very pleased with the team and their execution. The practice stands out for its combination of strong legal expertise, commercial understanding, and pragmatic advice. They are highly responsive, efficient, and solution-oriented, always focused on achieving the best outcome for the client.’
‘I would like to highlight the outstanding performance of Håkon Berge. He has been an invaluable support and trusted legal advisor to us, earning a high level of respect across our organisation. Having worked with Håkon now for several years, he has delivered high-quality services to us continuously.’
‘Thommessen is very professional and competent, excellent at client handling and has a very good business understanding. They have the competence and resources to handle everything from complex cases. The team has a very strong ability to handle complex and sophisticated matters, due to the highly competent individual lawyers and their ability to work in teams and dimension the teams so that it fits the case and the different stages of the case.’
‘The team is strong and works very well together, they are seamless at handling cases between them. Never overstaffed on any matter but at the same time always assigning enough experience to give good advice.’
‘Jostein Opdahl Jenssen - very competant quiet manner that gets to the heart of matters quickly. Exceptional handling of difficult witnesses.’
‘Partner Anders Sundsdal stands out for his speed, efficiency, and accessibility. He is available, provides clear and pragmatic solutions, and has helped our company save considerable time and resources. His combination of commercial understanding and practical problem-solving makes him a trusted advisor.’

Key clients

Total Energies EP Norge AS Scandinavian Airlines System Bane NOR SF Petoro Wintershall DEA Norge AS Gard AS Microsoft Norge AS B2Holding ASA Kahoot! Kongsberg Gruppen ASA NorgesGruppen ASA Bama Gruppen AS Yara International ASA Roche Norge AS University of Bergen Vestland county authorities FH Gruppen AS Höegh Autoliners Management AS CGG Services CapMan Infra CBRE Caledon DOF Subsea Etac AB Etac AS Frydenbø AS Framo AS Oceaneering AS Tidal Autostore AS NIKE Boliden Nestlé Kahoot! Klarna AB MDE Group AS MDE Personnel AS Agilent Technologies Boost Ai Zalando SE NVIDIA Dignita Systems Norge AS Phillip Morris Norge AS TUI Melberg Partners AS Parexel Intertanko CTEK Norway AS Seaway 7 Scatec Union Residental Holding Hunter Group ASA Danske Bank – Solo Bruun Hjejle MOWI Fakta AS Borger BP Currys Nordic Semiconductor Photocure 00Nation Brevik Engineering AS Contemporary Amperex Technology Co Ltd Field Group AS TheOFE.com - Ocean Freight Exchange HCL Technologies

Work highlights

Represented Wolt in a reclassification dispute concerning claims for employment status made by contractors providing delivery services. The case was heard by the City Court and is currently under appeal before the Court of Appeal.

Advised Petoro AS in connection with the Norwegian state’s takeover of the gas infrastructure on the Norwegian continental shelf. The transaction, valued at NOK 18.1 billion, involved multiple counterparties.

Represented Institut für Politikevaluation (IPE) on a lawsuit where a former consultant claimed employment and other benefits, which also concerned questions on governing law and legal venue. The client won the case in the District Court, the Appeal Court and in the Supreme Court.

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