Sebastian Breth Arnberg

Sebastian Breth Arnberg specialises in tax law with a particular focus on disputes with the Danish tax authorities, including complaints and lawsuits before the Danish courts.
Sebastian also advises a wide range of Danish and international companies and real-estate funds on all tax and company law aspects in connection with the sale and purchase of companies and real estate.
In addition, Sebastian is a part-time lecturer in tax law at the University of Copenhagen and an editor at Karnov (the leading provider of compilations of Danish statutes) in its international-tax team.
The Danish Lawyers’ Tax Law Association
The Danish Branch of the International Fiscal Association
Attorney, DLA Piper Denmark, since 2025
Attorney, NJORD Law Firm, 2023-2025
Assistant Attorney, NJORD Law Firm, 2022-2023
Head of Section, the Department of the Danish Ministry of Taxation, 2019-2021
Intern, Confederation of Danish Industry, Brussels, Belgium, 2018-2019
Law Student, Danish Industry, 2017-2018
Part-time lecturer, University of Copenhagen, since 2023
Editor, Karnov Group, since 2023