We have been advising Bremen since 1983

We are Bremen natives — Hanseatics in the best sense of the word. That means we do what we say and stand by our commitments. You can rely on us in all matters of auditing and tax consulting. We understand our mandates as both professional and personal advisory services, shaped through direct dialogue from entrepreneur to entrepreneur.

Our work goes far beyond numbers. It requires close, attentive support on an equal footing, as well as clear and open communication. Only in this way can respect and trust develop—forming the foundation for long‑term cooperation with our clients, particularly medium‑sized companies from the region and throughout Germany.

Having grown organically since 1983, we now operate from a single location with three companies. We employ nearly 50 people. Our headquarters are located in Villa Wolde on Bremen’s Osterdeich—a historic building that, following its renovation, meets contemporary standards. A house is as Hanseatic as we see ourselves.

1983:

The company was founded as  BMT Hanseatische Treuhandelsgesellschaft mbH Steuerberatungsgesellschaft, with its headquarters in Bremen.

1997:

Wolfgang Wingerning acquired all shares of the company. In addition, Felix Senge and Rainer Gerstmayr joined the partnership. Four years later, the company was renamed  WSG Hanseatische Treuhandgesellschaft mbH Wirtschaftsprüfungsgesellschaft, reflecting the names of the partners.

1998:

After extensive renovation, the company moved to Villa Wolde on Bremen’s Osterdeich. The project was realized in close and trusting cooperation with the property owner, who is also a long-standing client of WSG. Built between 1896 and 1898 in the Historicist style, the villa is protected by the state as an architectural monument.

2001:

The company established a branch office in Sittensen, headed by certified public auditor Hans‑Peter Willenbrock, who was admitted to the partnership at the same time.

Establishment of WSG Hanseatische Consulting GmbH Steuerberatungsgesellschaft, which is responsible for project business – initially in the field of specialist IT consulting, today more in the field of corporate restructuring.

2006:

The partnership  WSG Wingerning Senge Gerstmayr Wirtschaftsprüfer Steuerberater  was formed from the auditing and tax advisory practice of Wolfgang Wingerning, which had been operated as a individually owned practice for more than ten years.

2008:

Patrick Grabowski joined the companies as a new partner.

2013:

Wolfgang Wingerning retired from his role as an active partner.

2015:

The tax advisory practice of Ulrich Schwanemann was acquired, and the firm was subsequently renamed  WSG Schwanemann Wirtschaftsprüfer Steuerberater. Around 15 employees provide traditional tax

consulting services for SMEs, freelancers, and private individuals.

Felix Senge stepped down as an active partner. Kai Furche, who has been a shareholder of  WSG Hanseatische Consulting  since 2009, joined the other companies as a new partner.

2016/2017:

Extensive interior renovation of Villa Wolde.

2019:

WSG Schwanemann moved from its former premises on Hollerallee to Villa Wolde.

2023:

Christopher Schmidt joined the companies as a new partner.

Patrick Grabowski  retired as an active partner.

2024:

The two partnerships  WSG Wingerning Senge Gerstmayr  and  WSG Schwanemann were merged to form  WSG Bremen PartmbB.
At the same time, Stefan Lübben joined the companies as a new partner.

Find out more about us:

How we work

We see ourselves as partners for medium-sized businesses and entrepreneurs. Our strength and passion lies in providing comprehensive support to our clients – both professionally and personally. We offer a complete portfolio of services from a single source for auditing, tax consulting and accounting. As entrepreneurs with many years of experience ourselves, we know what medium-sized businesses need.

Honest and open communication is the basis for a trusting working relationship. We are always in dialogue and want to be available at all times. We explain what we do and why – clearly, comprehensively and transparently. In order to find the best solution together with our clients, we continuously seek feedback from all parties involved. This is especially important when implementation becomes complex or difficult.

Each client has several personal contacts – always one of our four partners and an experienced employee. The latter is usually responsible for the operational business. The partner is always informed about the status of the mandate and intervenes in the consulting process if necessary. Working in tandem guarantees our clients reliable, high-quality support.

We work together with our clients' solicitors or tax advisors in a straightforward and professional manner. And if necessary, we bring colleagues from our personal networks on board, especially when international or very specific problems need to be solved.

Who we advise

Our clients are predominantly family-owned businesses of all sizes and legal forms, owner-managed companies, as well as self-employed and freelance professionals. In addition, we advise private individuals such as employees, retirees and private individuals.

Our clients are at very different stages in their personal and professional lives. We work with them as partners throughout all phases – from founding a company to growth to corporate succession or an exit strategy. Our clients' willingness to work with us on a long-term basis is one of the greatest signs of trust they can show us.

Our knowledge from more than 30 years of consulting experience enables us to respond specifically to industry-related issues, develop tailor-made solutions and apply our knowledge across disciplines. This makes us the ideal partner for small and medium-sized enterprises.

We successfully advise the following industries: