Mr Rune Tjomsås Andersen > Arntzen de Besche > Oslo, Norway > Lawyer Profile
Arntzen de Besche Offices
PO BOX 2734
SOLLI
0204 OSLO
Norway
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Mr Rune Tjomsås Andersen
Work Department
Tax
Position
Partner. Andersen specialises in tax law and company law and has broad experience in these fields in both the public and private sectors. He has in-depth expertise on petroleum and energy taxes, property tax, general corporate taxation and international tax law. He has worked in the Norwegian Ministry of Finance’s Tax Law Department and has extensive experience of law-making and committee work.
Over the past 25 years, Andersen has assisted national and international clients in a variety of business sectors with matters relating to tax and tax law. He works primarily in the field of transactions, mergers and demergers, acquisitions, tax law, transfer pricing, property tax, contract negotiation, dispute resolution, tax administration law and company law. He also regularly assists in cases relating to VAT and special taxes.
Andersen regularly accepts assignments to represent clients in cases relating to direct and indirect taxation, property tax and company law issues. He has extensive experience of leading the legal side of projects involving major public and private sector entities and which raise complex legal questions relating to direct and indirect taxation, and other professional areas.
Andersen is knowledgeable about the various business sectors and is frequently used as a strategic advisor by his clients. He has considerable experience as a project manager for complex cases which also involve contact with the public authorities and the management of multiple stakeholders.
Career
2011 – Arntzen de Besche – Partner
2006 – 2010, Arntzen de Besche – Senior Lawyer
2002 – 2006, Arntzen de Besche – Senior Associate
2001, Arntzen de Besche – Associate
1998 – 2000, Arntzen, Underland & Co. – Associate
1994 – 1998, Ministry of Finance, Tax Law Department – Senior adviser, senior executive officer, executive officer
Languages
Norwegian, English
Memberships
Norwegian Bar Association.
Education
1993, Cand.jur. (Qualifying law degree), University of Oslo
Lawyer Rankings
Norway > Tax
Arntzen de Besche has a broad tax practice with cross-border capabilities, advising on matters involving corporate tax, VAT and petroleum tax elements; the group is also particularly experienced in tax issues relating to acquisitions and restructurings. The practice is co-led by international tax expert Eyvind Sandvik, who assists with tax treaties, acquisitions, restructurings and the establishment of incentive schemes for senior executives, and Rune Tjomsås Andersen, who has broad experience in transactions, disputes and regulatory work, particularly in the oil and gas, pharmaceuticals, aquaculture, shipping and technology sectors. Rudi Hamansen, who assists Norwegian and international clients with the tax aspects of reorganisations and acquisitions, particularly in the real estate space, is also a key practitioner.
Norway > Energy
The full-service energy offering at Arntzen de Besche spans commercial contracts work, regulatory advice, financing mandates, and M&A deals, acting for contractors and construction companies on developments, offshore wind projects, and contentious mandates. Karl Erik Navestad leads the oil and gas team, while Odd-Harald Berg Wasenden takes point on electricity and renewable energy matters. Rune Omdahl focuses on licensing, field development, and transactional matters for major oil, gas, and energy companies, particularly on the offshore side. The core team also includes energy tax specialist Rune Tjomsås Andersen, seasoned oil and gas adviser Anders Rødland, and associate Aleksander Dypvik Myklebust, who is recommended for international electricity projects. Thomas Borch-Nielsen joined the practice from Advokatfirmaet Grette AS in early 2024.