Claudine Vartian is known for her long-standing advisory experience, particularly for her in-depth competition and dispute resolution knowledge. She regularly advises and represents clients in court litigation or in front of competition and supervisory authorities in the course of proceedings, dawn raids and on-site inspections. In recent years she has advised leading Austrian banks in large-scale banking litigations.

Internationally respected legal publications such as Chambers Europe, The Legal 500 and Juve rank Claudine amongst Austria's leading lawyers for dispute resolution as well as EU and competition law. Claudine is also continuously ranked amongst the top 10 competition and antitrust lawyers in the annual Best Lawyers ranking of the Austrian business magazine trend.