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.

Legal 500 Editorial commentary

Accolades

Client satisfaction: Sector knowledge

Client satisfaction: NPS ®

Testimonials

Collated independently by Legal 500 research team.

‘Partner Anders Sundal 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.’
‘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.’
‘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.’
‘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.’
Tron Dalheim is a brilliant lawyer who listens to their client's views and, at the same time, gives clear advice. He is always there for the client and delivers on time. He can stay calm even in very stressful situations. I really appreciate the support he gives to us.’

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

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.

Lawyers

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