Firm Profile > Kobylanska Lewoszewski Mednis > Warsaw, Poland

Kobylanska Lewoszewski Mednis

Data privacy and data protection Tier 1

Data privacy is at the core of Kobylańska Lewoszewski Mednis' focus as a firm and the group is a key name for clients in the e-commerce, media, technology, video gaming and financial services sectors. Jointly leading are co-founding partners 'very skilled lawyerAnna Kobylańska, whose specialisms include big data and the use of personal data in the internet of things (IoT) and behavioural targeting, as well as IT systems implementation projects; Marcin Lewoszewski, who has vast experience representing clients in proceedings before the data protection authorities; and Arwid Mednis, whom clients see as 'an absolutely star practitioner in the field which makes the firm very competitive when it comes to seeking advice'. Mednis is regularly instructed on GDPR implementation projects, including in relation to government entities.

Practice head(s):

Anna Kobylańska; Marcin Lewoszewski; Arwid Mednis, Partner


The law firm provides high level of legal advice in data privacy and data protection matters. The lawyers have profound knowledge, extensive experience and a business approach. A special knowledge in data protection can be easily applied to a given business case in such a way that a comprehensive product is worked out.’

Top-notch and best on the market knowledge in GDPR related issues, supported with a relevant practice and efficiency with defending the client’s position during potential proceedings.

KLM law firm is very eager to learn about business of their clients, they listen a lot before proposing solutions and giving answers. They have a good combination of being knowledgeable about law and about business.’

Anna Kobylańska is a very skilled lawyer, with broad knowledge, having profound experience. She is a very good advisor for structuring business scenarios where data protection regulations have to be taken into account. Anna knows diverse practices available on the market and related to data protection, which is a significant benefit in cooperation with her. She is always up-to-date with new regulations and their interpretations same as with significant court’s decisions.’

The undoubted added value is that employees analyse the problem not only of the current step, which is subject to analysis, but also very thorough and detailed analysis of the activities before and after it. Together with the client, they consider various scenarios, asking for details, often making the client aware of some actions or circumstances that occur in the process. They are able to identify risks and make the client aware of the necessary actions.’

Marcin Lewoszewski and Anna Kobylańska – they communicate well and are real experts in their fields.’

Arwid Mednis is an absolutely star practitioner in the field which makes the firm very competitive when it comes to seeking advice.’

Arwid Mednis is a star individual on the Polish market with academic background and so his specialized knowledge is very valuable. His extensive professional experience makes him an industry leader and a first choice counsel when it comes to even the most complex matters. He is actively involved in public discussions on industry problems and so may easily relate to practical challenges businesses face.

Key clients

City of Warsaw

Our goal is to provide complex, specialized support to our customers’ key issues – we are constantly close to them, providing the most precise, clear, and business-oriented legal advice – always tailored to their business needs.

While we rely on our many years of experience, gained in well recognized international law firms operating in Poland, we often serve as “best-friends” to number of international law firms with no established presence in Poland.

We have passion to privacy and technology. Actually, that’s one of the key conditions to join our team.

In effect, international legal directories ranks us among top data protection law firms in Poland – according to Chambers and Partners Europe, dr hab. Arwid Mednis is ranked in Band 1, Anna Kobylanska in Band 2 and Marcin Lewoszewski in Band 3 in “Data Protection” category for Poland.

What we do
We support our clients in most complex cases that they face in relation to privacy. We work with our clients on top-notch litigation cases with the DPA, as well as support them in difficult data breaches. We are focused on sectors, as majority of work that we do is related to technology, financial, e-commerce, lifesciences and video games.

On a daily basis, we provide legal consultancy in the field of data privacy, copyright and related rights, trademarks, know-how, provision of electronic services and telecommunications law.

Department Name Email Telephone
Marcin Lewoszewski +48 604 817 352
Anna Kobylanska +48 515 975 705
dr hab. Arwid Mednis + 48 510 087 786
Photo Name Position Profile
Mrs Anna Kobylanska photo Mrs Anna Kobylanska Partner
Mr Marcin Lewoszewski photo Mr Marcin Lewoszewski Partner
Dr hab Arwid Mednis photo Dr hab Arwid Mednis Partner
Number of lawyers: : +10