The law firm tqf legal provides high-end legal services and efficient entrepreneurial solutions for legal challenges. We understand your business, as well as your technical and personal background. Highly specialised advice in intellectual property law, copyright law, media and press law and competition law.


Legal Areas

We advise our clients comprehensively in the areas of intellectual property law, competition law, media law, pharmaceutical law as well as data protection and numerous related commercial law issues, such as contract, labour and corporate law. A special focus of our law firm is also litigation and interim legal protection. We often also act within national or international teams from various specialist areas.


Til Quadflieg, M.A.

Til Quadflieg has worked for many years as a lawyer in the top tier law firms Quinn Emanuel Urquhart & Sullivan (Munich), Harmsen Utescher (Hamburg) and Preu Bohlig & Partner (Hamburg / Berlin) before founding the law firm tqf legal in Berlin in 2020.

Besides companies he also advises private individuals in press and media law as well as in employee invention law. He has an extensive national and international network. He regularly gives lectures and publishes in Germany and abroad.

Til Quadflieg studied law and philosophy at the same time in Bremen and respectively graduated as one of the best of his year. Subsequently, he has worked for two years at the Chair of Philosophy of Law, Theory of Law and Criminal Law of Prof. Felix Herzog. He completed his legal traineeship in Berlin (including a working period at CMS Hasche Sigle).

In 2023, Handelsblatt and Best Lawyers honoured Til Quadflieg as one of Germany's best lawyers in the field of intellectual property law.

Til Quadflieg Portraitbild

Dr. Karsten Engelke
(Medical Law Specialist)**

Dr. Karsten Engelke advises companies in the healthcare industry on all legal issues (with the exception of reimbursement by the statutory health insurance). After working as a lawyer for a major international law firm, Karsten Engelke worked for many years in two well-known medical law boutiques in Berlin, most recently as a salary partner at Dierks + Company. He advised international pharmaceutical companies and large corporations as well as startups, medical device companies and developers of digital products on market access in Germany, in particular on regulatory issues.

Dr. Karsten Engelke has been recognized by the industry handbook JUVE and the international law firm handbook Legal 500 as a frequently recommended lawyer in the areas of healthcare law and pharmaceutical law. He is a member of the ethics committee of Charité Universitätsmedizin and lectures on health law at the University of Bremen and on innovation law in the healthcare industry at the Technical University of Berlin. Since October 2021, Dr. Karsten Engelke has been working as in-house counsel for the GKV-Spitzenverband in the area of pharmaceutical law. Since the end of 2021, Dr. Karsten Engelke has been working as Of Counsel for tqf legal (no employee, no partner).

Nina Kratz*

Nina Kratz had worked as a judge in social jurisdiction and chaired several court chambers before deciding to join the advocacy at tqf legal. She has extensive expertise in the field of health law. Mrs. Kratz is also a competent contact in the field of intellectual property law, including competition law and the regulation of advertising medicinal products.

Nina Kratz studied law at the Friedrich Schiller University and passed both exams with distinction. After her studies, she worked as a research assistant at the law firm Beiten Burkhardt in the areas of employment law and data protection.

Dr. Bijan Moini, M.A.**

Dr. Bijan Moini, M.A., provides legal advice in various fields, including media law, IT and data protection law, constitutional law, European law, and public economic law. He specializes in developing strategic processes aimed at obtaining landmark decisions from the German and Constitutional Courts or the European Court of Justice.

Since 2014, he has been working as a lawyer. After three years at a renowned Berlin law firm, he joined the Society for Civil Rights e.V., where he has been leading the legal team since 2021. He has already argued several constitutional complaints before the Federal Constitutional Court, which were coordinated by him. Since 2023, he has been working as Of Counsel for tqf legal (not an employee or partner).

Moini studied law and political science in Munich and Paris. He obtained his doctorate from LMU Munich, supervised by the former President of the Federal Constitutional Court, Hans-Jürgen Papier.

Moini is also an author. He has published three books and regularly writes on social and political topics for various media outlets. Additionally, he is a board member of the Foundation Every Human Being initiated by Ferdinand von Schirach and a member of the Media Council of the Media Authority Berlin-Brandenburg.

Dr. Stefan Zenker, LL.M. (London)**

Dr. Stefan Zenker advises on intellectual property law (particularly trademark law, design law) as well as on competition law and copyright law. He represents clients in and out of court as well as before the competent offices in trademark and design proceedings (particularly EUIPO, DPMA). He also focuses on the development of intellectual property strategies (particularly trademark and design applications), the drafting of licensing and delimitation agreements, and the legal support of advertising measures. He also has specific experience in the negotiation and drafting of research and development (R&D) agreements as well as in transaction-related IP/IT.

Dr. Zenker has been practicing law since 2010, initially at the Munich office of U.S. commercial law firm Milbank, later at the renowned Hamburg IP law firm Harte-Bavendamm, and most recently as an independent attorney (Zenker IP) in Berlin. In addition to his legal work, Dr. Zenker has also worked as an in-house lawyer and specialist expert for trademark and competition law in the corporate legal department of Deutsche Bahn since 2017. The industry handbook JUVE writes: "One lawyer praises him as 'one of the top in-house trademark lawyers'" (2022). He has been Of Counsel at tqf legal since 2023 (no employee, no partner).

Dr. Zenker studied law in Leipzig, Augsburg, Innsbruck and at King's College London. He passed the first state law exam as top of his university's class, and the second state law exam among the top 4% of his class in the Free State of Bavaria. Dr. Zenker received his doctorate from LMU Munich, as a fellow of the Max Planck Institute for Intellectual Property and Competition Law.

Dr. Zenker regularly publishes and speaks primarily on trademark and competition law topics, most recently as a speaker at the German Lawyers' Day on environmentally related advertising claims ("greenwashing"). He is also a lecturer for intellectual property and competition law at HWR Berlin.

* Employed lawyer
** Of Counsel without partnership interest



We are looking for committed  lawyers (m/f/d), legal trainees (m/f/d), to strengthen our dynamic team in Berlin.

We are looking for committed  research associates (m/f/d) to strengthen our dynamic team in Berlin.

We are looking for committed  freelance partners (m/f/d) to strengthen our dynamic team in Berlin.



tqf legal
Law firm 

Tel: +49 30 2359037 00
Fax: +49 30 2359037 09

Kanada Haus
Voßstraße 20
10117 Berlin

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