Rosinus Partner operates comfortably across various industries, such as finance, technology, pharmaceutical, and construction, covering advice on offences including embezzlement, money laundering, breach of trust, insider trading, and corruption. The practice is steered by Christian Rosinus, who combines expertise in commercial, white collar and criminal tax law, while Mathias Grzesiek is recommended for criminal law related to the healthcare sector. Arthur Leonhardt joined from Clifford Chance in April 2025, bolstering the team’s capabilities in foreign trade and sanctions law. Janina Brandau left the firm in March 2025.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Testimonials
Collated independently by Legal 500 research team.
- "Absolute commitment to quality and finding the most efficient solution for this specific case.
- 'Christian Rosinus and Mirjam Steinfeld are true experts and absolutely reliable, my first choice for criminal law and compliance law.'
- 'The firm demonstrates a high level of expertise and flexibility. Our collaboration with the firm has been very friendly and professional for many years.'
- "All the firm employees with whom we have worked so far are characterized by a high level of expertise. Furthermore, the collaboration is always very friendly and constructive. Regardless of when we contact them, we receive a very quick or immediate response, and our inquiries are processed without delay."
- 'Christian Rosinus possesses exceptional knowledge not only of German law, but also of the entire German legal system. He has a proven track record of achieving outstanding results for his clients.'
- "Development of legal tech tools, very client-oriented, absolute experts."
- "The firm maintains a strong presence on social media, regularly providing its clients with helpful insights and tips, as well as overviews of changes in the legal framework within its field and noteworthy court rulings. It appears to have a good proportion of female partners and actively promotes diversity within its multicultural team."
- "Christian Rosinus possesses exceptional knowledge not only of German law, but also of the entire German legal system. He has a proven track record of achieving outstanding results for his clients."
- 'Development of legal tech tools, very client-oriented, absolute experts.'
- 'Small team guarantees personal attention.'
Lawyers
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Practice head
Christian Rosinus
Other key lawyers
Mathias Grzesiek; Mirjam Steinfeld; Arthur Leonhardt