National and international connections for your benefit
In April 2021, the Advisio offices in Gummersbach and Siegen joined the ETL Group and now operate under the names Advisio Gummersbach ETL GmbH and Advisio Siegen ETL GmbH, respectively.
The ETL Group is successfully active in the areas of tax consulting, auditing, legal consulting, management consulting and financial services in more than 900 law firms in Germany and a further 250 law firms worldwide.
For international issues Advisio cooperates with the worldwide operating expert network ETL Global. This enables us to find the optimal solutions for your company in more than 50 countries together with our local professional colleagues.
Furthermore, the international cooperation with MauerGroup Russia has proven its worth over many years.
For many years, Advisio Treuhand & Revision Gummersbach GmbH & Co.KG has successfully cooperated with Cologne Kirchhof law firm as a partner for all issues regarding company law, insolvency law and labour law if more detailed elaboration is required.