Janina Diesem

Claudia Maaßen LL.M. is a lawyer and partner at Friedrich Graf von Westphalen & Partner. She has been working in the litigation and arbitration practice group of Friedrich Graf von Westphalen’s Cologne office since 2016. Claudia Maaßen is a specialist in dispute resolution with a focus on manager liability and D&O and product liability. Her clients include insurance companies, managers and private companies. Claudia Maaßen speaks German, French and English.

Born in 1954 Legal studies at the University of Münster First Exam ("1. Staatsexamen") in 1979 Legal clerkship ("Referendariat") at the Paderborn District Court Second (Bar) Exam ("2. Staatsexamen") in 1983 Research assistant at the Chair for Civil Law and Labor Law at the University of Münster, 1983 to 1985 Doctor of Laws (Dr. jur.) 1985 Employed at Bayerische Hypotheken- und Wechselbank, 1986 to 1987 Bar admission in 1987 and with the firm since then.

Norbert Schulte is a lawyer recognized by Best Lawyers in the practice areas of Corporate Law, Mergers and Acquisitions Law and Real Estate Law. Norbert practices law in Düsseldorf, Germany Best Lawyers has recognized Norbert Schulte since 2018. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Norbert Schulte is held by other lawyers.

Jan Schellenberger is a lawyer recognized by Best Lawyers in the practice area of Real Estate Law. Jan practices law in Cologne, Germany Best Lawyers has recognized Jan Schellenberger since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Jan Schellenberger is held by other lawyers.

Jörg Bornheimer is a lawyer recognized by Best Lawyers in the practice area of Restructuring and Insolvency Law. Jörg practices law in Wuppertal, Germany Best Lawyers has recognized Jörg Bornheimer since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Jörg Bornheimer is held by other lawyers.

Benedikt Schulz is a lawyer recognized by Best Lawyers in the practice area of Restructuring and Insolvency Law. Benedikt practices law in Düsseldorf, Germany Best Lawyers has recognized Benedikt Schulz since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Benedikt Schulz is held by other lawyers.

Dr. Patrick Vogt is a lawyer recognized by Best Lawyers in the practice areas of Corporate Law, Mergers and Acquisitions Law and Private Equity Law. Dr. Patrick practices law in Düsseldorf, Germany Best Lawyers has recognized Dr. Patrick Vogt since 2020. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Dr. Patrick Vogt is held by other lawyers.

Sebastian von Lossow LL.M. is a lawyer and partner at Friedrich Graf von Westphalen & Partner. He has been working in the corporate law and M&A practice of Friedrich Graf von Westphalen’s Dusseldorf office since 2025. Sebastian von Lossow is a specialist in M&A, joint ventures and real estate transactions. His clients include entrepreneurs, family offices and mid-size companies (industrials, engineering as well as software-as-a-service) and real estate managers and investors...

Dr Marcus Richter offers advice on all aspects of individual and collective labour law to national and international companies. In particular, he has considerable experience advising on corporate acquisitions, reorganisations, restructurings, outsourcing and integration projects. As part of this he is responsible for both the strategic conception and the negotiations with unions and works councils on wage agreements, settlement of interests, social plan, company agreements and arbitration pro...

Christoph Angerhausen is a lawyer recognized by Best Lawyers in the practice area of Intellectual Property Law. Christoph practices law in Düsseldorf, Germany Best Lawyers has recognized Christoph Angerhausen since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Christoph Angerhausen is held by other lawyers.