
The TMT department at CMS is praised for ‘exceptional project execution and client service’, with particular expertise in tech issues such as cloud platforms, AI, software, IT, cybersecurity and e-commerce. The clientele spans various highly regulated industries, such as finance, automotive, entertainment, and FMCG. Tomasz Koryzma leads the team, and is proficient in IP and data protection matters. Damian Karwala is a key choice for clients from the telecoms sector, while Maciej Olejnik is adept at brand protection with a focus on patents. Adriana Zdanowicz-Leśniak, Karina Zielińska-Piątkowska and Agnieszka Czopska are also key members of the practice, specialising in regulatory compliance, unfair competition, and data security respectively.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- The individuals at TMT CMS stand out through their exceptional professional qualities and remarkable team dynamic. What truly impresses is the respectful and positive atmosphere within the team; their mutual appreciation for each other's expertise creates an environment where collaboration flourishes naturally. This positive internal culture directly translates into better client service and more effective project execution. What makes them particularly special is: - The warm and supportive team atmosphere - Genuine respect between team members at all levels - Natural knowledge sharing and collaboration - Proactive approach to client communication
- The TMT CMS team distinguishes itself through exceptional project execution and client service. Their key strength lies in thoughtfully matching specialists to specific projects, ensuring optimal expertise for each challenge. The team's commitment to a thorough understanding of client needs is demonstrated through their openness to in-depth discussions and consultations. What makes this practice particularly impressive is the strong internal dynamic among team members, characterized by mutual respect and effective knowledge sharing. This creates an environment where complex problems are solved through collaborative effort and diverse expertise. When compared to other firms, TMT CMS stands out through: - Strategic allocation of specialist expertise - Dedication to understanding client needs through open dialogue - Strong internal collaboration
- The firm stands out for its exceptional level of specialization and deep knowledge of the industry in which it operates. The team is comprised of experts with extensive knowledge and experience, which translates into effective and accurate advice. Potential clients will certainly appreciate the personalized approach to each case and transparent communication. Compared to other firms, the firm stands out as a trustworthy partner who not only solves problems but also anticipates risks. The introduction of flexible billing models and digital document management tools are innovations that significantly improve collaboration.
- CMS has a team of experts within the TMT area, and we at Microsoft are working with CMS on AI projects and events. They have a deep understanding of potential customers' concerns and address them proactively. They are very responsive.
- The people I work with at the firm are distinguished by their exceptional level of competence and complete commitment to their assigned tasks. Each team member demonstrates a high level of responsibility and accuracy, which translates into the high quality of the services provided. The firm prioritizes reliability and punctuality, which builds trust and a sense of security in our collaboration.
- 'They have deep understanding of the potential customers' concerns and address them proactively. They are very responsive.'
Key clients
- Microsoft
- Citi
- RTB House
- Airbnb
- Vypr
Work highlights
Supported Microsoft in organising a conference about legal aspects of AI usage by lawyers.
Acting as strategic legal advisor to a European retail chain, providing support on IT contracts including licensing, implementation, SLAs, and data processing agreements across multiple jurisdictions.
Advised Citi on the development of internal AI governance documentation in line with the EU AI Act.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Tomasz Koryzma
Other key lawyers
Damian Karwala; Maciej Olejnik; Adriana Zdanowicz-Leśniak; Karina Zielińska-Piątkowska; Agnieszka Czopska

