Advisio – unsere Erfahrung für Ihren Erfolg

The Advisio team - history

Half a century of experience in tax consulting, business consulting and auditing

The foundation stone of today's Advisio company was already laid in 2007 by partner Dieter Wagener. He has been working as a self-employed tax consultant and auditor since 1988 and was a partner in a supra-regionally operating auditing/tax consulting company at the Gummersbach location for many years.

The founding of the original Advisio tax firm took place in a kind of spin-off, as a purely legal start-up.
At that time, the company continued to handle medium-sized mandates, preferably from the industrial sector, and also mandates of all legal forms from various entrepreneurial areas, focusing on qualified consulting and auditing.

In the course of the consistent further development of the tax firm, Dipl.-Kfm. (FH) Thomas Hildebrand, tax consultant, was added to the group of partners at the beginning of 2012. He also has more than 20 years of professional experience in tax consulting.

Thematically and geographically, the Advisio team was able to expand significantly in 2013 with the addition of the Siegen location. As a result, the Advisio company's field of activity was expanded to include tax, fiscal and economic consulting for physicians and the medical professions - the highlighted focus of the Siegen location. The Siegen location is successfully managed by Susanne Hachenberg, tax consultant.

Since April 2021 we have joined the ETL Group and the worldwide operating network ETL Global. The ETL Group is successfully active in the areas of tax consulting, auditing, legal consulting, management consulting and financial services in more than 900 tax/law firms in Germany and another 250 tax/law firms worldwide.

Thus, we can now complement our existing services of tax consulting, auditing and management consulting with the expert knowledge of the ETL Group for our clients. Furthermore, our clients can rely on the legal advice of ETL's lawyers.

Together with a well-coordinated team of employees, comprehensive knowledge has been continuously built up and expanded over the past years, which is constantly incorporated into individualized consulting concepts tailored to the needs of our clients. We will continue to be committed to this standard in the future.


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