Claus Holberg is especially engaged in tax law. Within the area of tax law, he provides advice on the sale and purchase of enterprises, ownership transfer and restructuring and conducts litigation. Over the years, Claus has conducted a large number of legal proceedings within several legal areas and thereby gained profound experience in this respect.

In addition, Claus provides general business advice and is an experienced advisor of public authorities and frequently provides advice to both the Danish State and Danish municipalities on issues relating to public law.