About Us

ETL Hannes & Kollegen stands for tax advice 4.0. We are more than 50 colleagues, tax consultants, tax compliance experts, certified accountants and assistant tax consultants, who live quality and love modern technology.

In our industry, we are technology leaders. With the electronic client record, digital vendor management and digital accounting as well as optimally optimized business processes, we offer you an efficient, high-quality and up-to-date service.

Our quality is checked regularly by DQS. We are certified according to ISO 9001: 2015 and bear the quality seal of the German tax consultant association e.V.

As part of the ETL community, we offer our clients holistic and tailor-made solutions for all tax and legal matters.

Members of Management

Thomas Hannes

Tax Consultant · Shareholder-Director

Telephone: 030/72 61 50 - 501

E-Mail: thomas.hannes@etl.de

Marijke Hannes

Business Lead
Authorised representative
Telephone: 030/72 61 50 - 516
E-Mail: marijke.hannes@etl.de

Lutz Nicolaus

Business Administration
Tax Consultant· Business Manager
Telephone: 030/72 61 50 - 500
E-Mail: nicolaus@etl.de

Dominik Härtel

Tax Specialist · Department Manager
Telephone: 030/72 61 50 - 514
E-Mail: haertel@etl.de

Kai-Friso Schmidt

Assistant Tax Consultant · Department Manager
Telephone: 030/72 61 50 - 538
E-Mail: kai-friso.schmidt@etl.de

Doreen Zimmermann

Head of Quality Management · Department Manager
Telephone: 030/72 61 50 - 504
E-Mail: zimmermann@etl.de