His expertise not only covers tax planning and its contractual implementation but also supporting clients in preparing tax returns. Furthermore, Dirk represents clients in tax audits, administrative appeal procedures with the tax authorities and in tax court proceedings.

Besides the general issues of group taxation, Dirk also specialises in international tax law. In this context, his extensive experience includes expertise on the taxation of foreign companies with limited tax liability, cross-border restructurings including company valuations, taxation of permanent establishments, double taxation law and refunding of or indemnity from withholding tax. Dirk also focuses in particular on advising clients in the field of determining, documenting and defending transfer pricing as well as on the implications for international companies in view of the implementation of BEPS measures.

In addition, Dirk regularly advises on tax-related issues in the context of transactions in the field of M&A, private equity and venture capital. He can draw on wide experience in advising clients on joint ventures as well as on real estate transfer tax.

Dirk is a lecturer at the University of Cologne (LL.M. Business Taxation programme).