Mann mit Regenschirm im Sturm. Die Kanzlei Dierkes lässt Sie nicht im Regen stehen.

The Dierkes law firm will not leave you out in the rain.

You deserve a dedicated lawyer and tax advisor!

Lawyer and tax advisor Thorsten Dierkes sees itself as your modern service provider for your tax and legal matters in order to help you achieve your rights. The law firm Dierkes advises, supports, represents and coaches you as an entrepreneur, partner, managing director, board member, freelancer or private person primarily in the legal areas of tax law, company law, and commercial law.

Advice is provided quickly, efficiently and securely using the latest digital tools and communication tools. As far as legally permissible, only a paperless office is used.

The Dierkes law firm is at your disposal at any time for a non-binding and free discussion to assess the legal situation as well as a cost estimate if the advice is taken over, by telephone, Skype video conference or in person.

True to our guiding principle “fairly simple”, we get your legal matters understandable and effective.

Talk to us “Quite simply”!


Personal advice and many years of professional experience make Dierkes law firm as a commercial law firm a reliable and competent contact for questions of law, taxes and consulting. With a comprehensive cooperation network, the law firm Dierkes covers almost all legal fields in breadth and depth and thus offers client-oriented solutions from a single source.

The law firm Dierkes advises and represents you quickly and easily in the enforcement or defense of your right. The latter in particular in litigation and arbitration.

Advising companies and entrepreneurs – also strategically – is the daily business of the law firm Dierkes. For other law firms, I also work as an external expert in questions of corporate law, commercial law, contract law, tax law and inheritance law.

The law firm Dierkes has a broad international work and cultural experience. Our working languages ​​are German, English and Spanish.

There are good and reliable business contacts, particularly in southern Africa. These could possibly be of value to you for the initiation and the establishment of a company in this area.

There is also extensive expertise in the control and monitoring of (international) project work.

Memberships exist with the German Lawyers’ Association, the Oldenburg Bar Association, the Lower Saxony Chamber of Tax Consultants, the Association of Tax Consultants and DATEV e.G.

The law firm Dierkes takes its responsibility to reduce the consumption of resources and ecological footprint seriously. Against this background we work – as far as possible – paperless and otherwise only with 100% recycled paper. Business trips are reduced as much as possible through the use of telephone and (video) conferences.


Vollkörperfoto Thorsten Dierkes mit Hintergrund

Thorsten Dierkes

Thorsten Dierkes is a lawyer, specialist lawyer for tax law, tax consultant, graduate in finance (FH) and lawyer.

Professional Qualifications

    • Passing the notarial examination (prerequisite for admission to the notary)
    • Specialist lawyer for tax law since 2006
    • Tax consultant since 2003
    • Attorney since 2000
    • Lawyer since 1997
    • Diplom-Finanzwirt (FH) since 1993

Professional career

  • 2019: Dierkes law firm – legal advice and tax advice
  • 2017: Lawyer and tax advisor at a large law firm in Oldenburg
  • 2014: Attorney and tax advisor at PricewaterhouseCoopers AG (pwc), Düsseldorf
  • 2012: Society for International Cooperation (GIZ) GmbH, Consultant of the Zambian financial administration Zambia Revenue Authority for two years, location: Lusaka, Zambia </ li>
  • 2007: Attorney and tax advisor at PricewaterhouseCoopers AG (pwc) / PricewaterhouseCoopers Legal AG, Düsseldorf
  • 2000: Attorney and tax advisor at BDO Deutsche Warentreuhand AG, Bremen
  • 1998: Freelance employee at the law firm Peter Feitsch – Otto Korte – Josef Dierkes (later: Otto Korte – Stefan Dierkes – Ulf Künnemann)
  • 1990: Senior civil servant in the Lower Saxony Finance Administration (Finanzamt Oldenburg and Finanzamt Cloppenburg)
  • </ Ul>



  • Deutsch
  • Englisch
  • Spanisch


Clients of the law firm Dierkes are entrepreneurs of all legal forms as well as their owners / partners, private individuals and start-ups in the specialist areas


The law firm Dierkes advises and represents you comprehensively in corporate and commercial law matters, out of court as well as in court.


In addition to the preparation of annual financial statements and tax returns, the design tax advice to minimize the tax burden is the expertise of the law firm Dierkes.

Business start

Optimal legal advice in the start-up phase of a company helps to avoid later problems. In the course of special consultations, all questions relevant to the founding of a company are discussed and an individual concept is worked out with you.

Economic advice

he comprehensive advisory concept of the law firm Dierkes includes comprehensive (tax) legal advice as well as business advice, including business and private investment planning.

Project management & digitization

In the course of his professional activity, the law firm owner has gained a high level of expertise in the planning, implementation, and monitoring of - also international - projects. Benefit from it!

Management & Strategie

As part of the management & amp; Strategy consulting, in particular, the processes in your company or project are examined for efficiency and profitability, optimizations are suggested and the implementation is prepared.

Make an appointment for a non-binding and free initial consultation. Just call and make an appointment for a telephone or personal meeting.



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The client training and client seminars take place at the law firm Dierkes in close coordination with the client’s needs. The law firm Dierkes is geared to your needs. You don’t have to follow us. 

Against this background, you will find a permanent and non-binding survey on this website under the following link, where you can rate proposed topics or enter your own topics for training and seminars in free text form. Depending on your feedback, the law firm Dierkes will then plan the training courses and seminars. </ Span>

If you are interested in online seminars / training courses / lectures, you can also express your interest in this regard. In everyday working life, there is often no time to travel especially for a one-hour lecture. One would like to be online, however. 

To the survey


As part of a social commitment (corporate social responsibility), the law firm Dierkes is involved in the “Friends of Hada Huigu Care Center”, an orphanage for needy children in Namibia. Further information is available here .

Feuerwehrmann vor einem Feuer: Nicht immer können Feuerwehrleute helfen, wenn mal Ihre "Hütte" brennt! Dann kontaktieren Sie uns!
Firefighters cannot always help when your "hut" is on fire. Then call the law firm Dierkes!


Contact via the following form

    Portrait der Sekretärin. Die Kanzlei Dierkes steht Ihnen jederzeit zur Verfügung.
    Die Kanzlei Dierkes steht Ihnen jederzeit zur Verfügung.

    Contact information

    Thorsten Dierkes
    Attorney at Law | Tax Advisor | Specialist lawyer for tax law
    Telephone: +49 441 4854613 | Fax: +49 441 4854619
    Skype: dierkest
    Email: (attachments up to 20 MB per email)

    Dierkes law firm
    Ina-Seidel-Str. 28
    26133 Oldenburg

    (free parking available)

    opening hours

    Monday to Thursday: 9 a.m. to 6 p.m. Friday: 9 a.m. to 6 p.m. and by appointment You can send emails or leave voice messages on the answering machine at any time. A feedback is given immediately.

    Encrypted email communication

    Dierkes takes security in communication and the secure exchange of data very seriously. If you wish to have professionally encrypted e-mail communication against this background, please use the public key of the firm. Alternatively, you can also use the above Use the Dierkes law firm’s email address. In order to be able to use this De-Mail address, you need your own De-Mail address . At the client’s request, large amounts of data can also be exchanged via cloud storage. You can find more information here .
    Siegel der Rechtsanwalts- und Steuerberaterkanzlei Dierkes Rechtsberatung Steuerberatung in Oldenburg Diplom-Finanzwirt Diplom-Jurist

    Kanzlei Dierkes

    • +49 441 4854613
    • Ina-Seidel-Str. 28
      26133 Oldenburg

    • Opening hours
      Mon-Fri 9:00 AM to 6:00 PM
      and by arrangement

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    0441 – 4854613