Chan-jo Jun
Founder, lawyer and Fachanwalt für IT-Recht (specialist lawyer for IT law)Founder of the firm, known for the proceedings against Facebook and others, today focusing on platform liability and social media law.
More than twenty specialists
across the spectrum of modern IT law.
The team of JUN Legal GmbH is now home to nine Fachanwälte für Informationstechnologierecht (specialist lawyers for IT law) — a concentration that is rare in Germany. They are joined by a Fachanwältin für Gewerblichen Rechtsschutz (specialist lawyer for industrial property law), further lawyers specializing in individual fields of IT law, legal trainees (Referendare), research associates, and an experienced secretarial team.
Lawyers
Christian Galetzka, LL.M.
Lawyer and Fachanwalt für IT-Recht (specialist lawyer for IT law)Key contact for data protection and data law with a further focus on e-commerce; Master's degree “Informationsrecht” (information law) (Oldenburg).
Yvonne Roßmann
Lawyer and Fachanwältin für IT-Recht (specialist lawyer for IT law)Heads the firm's FOSS compliance team; further focus areas in AI & law as well as IT contract law and copyright law in general.
Johannes Partheymüller
Lawyer and Fachanwalt für IT-Recht (specialist lawyer for IT law)Specializes in legal-tech and AI projects and, accordingly, lectures on legal tech in the LL.M. Digitalization & Law program at the University of Würzburg.
Lisa Breunung
Lawyer and Fachanwältin für IT-Recht (specialist lawyer for IT law)Focus on software licensing law with particular experience in FOSS & automotive.
Matthias Pilz
LawyerAdvisory focus on FOSS compliance, platform law, and copyright & media law; experience in local politics as a member of the Würzburg city council.
Patrizia Frankenberger
Lawyer and Fachanwältin für Gewerblichen Rechtsschutz (specialist lawyer for intellectual property law)Advisory focus on trademark, data protection, e-commerce, and IT contract law; ten years of leadership experience in the legal department of an international fashion company.
Florian Hackel
Lawyer and Fachanwalt für IT-Recht (specialist lawyer for IT law)Advisory focus on cybersecurity (CRA, NIS-2, DORA) and AI regulation; many years of experience in FOSS compliance.
Julia Kendziorra
Lawyer and Fachanwältin für IT-Recht (specialist lawyer for IT law)Specialist in IT contract law, FOSS compliance, and cybersecurity (NIS-2, DORA), including as external support for in-house legal departments.
Ulrich Kulke
LawyerFocus on e-commerce, commercial and general business law as well as succession law; many years of teaching at the Repetitorium Hemmer (bar exam preparation institute).
Dr. Sebastian Volk
LawyerTrained business mediator; advisory focus on social media law and FOSS compliance.
Alexander Rohen
Lawyer and Fachanwalt für IT-Recht (specialist lawyer for IT law)Trained business mediator; advisory focus on FOSS compliance and platform law.
Melanie Eisentraut
LawyerSpecializes in FOSS compliance as well as copyright and competition law.
Manuela Bischof
Lawyer and Fachanwältin für IT-Recht (specialist lawyer for IT law)Advisory focus on IT contract law, e-commerce, and competition law.
Maike Hofmann
LawyerFocus on e-commerce and FOSS compliance advisory.
Dr. Sophie Garling
LawyerLead for the AI & law practice, built on a doctorate in legal tech; further focus on FOSS compliance and IT contract law.
Annika Niemann
LawyerAdvisory focus on cybersecurity and AI regulation as well as FOSS compliance.
Lisa Renker
LawyerSpecializes in FOSS compliance, copyright law, data protection, and AI & legal tech.
Dr. Jessica Flint, LL.M. (Edinburgh)
LawyerSpecialist in platform law and social media, with a doctorate in this field, complemented by an LL.M. from the University of Edinburgh.
Sahra Gaa
LawyerFocus on IT and IP law as well as AI advice.
Valentin Wild
LawyerSpecializes in FOSS compliance, covering both legal and technical aspects.
Niels Gehrig
LawyerFocus on software licensing law and social media law issues; additional bachelor's degree in political science.
Office management & support
Tanja Müller
Office manager & qualified legal assistant (Rechtsanwaltsfachangestellte)Head of office administration since 2011, with the firm since 2004, responsible for accounting and HR; trained in 1992 at a Würzburg law firm.
Vanessa Bayer
Legal assistantQualified legal assistant since 2022, with a master's in literary studies and a bachelor's in German and English studies; part of the firm's office team since 2024.
Daniela Greubel
Office teamUniversity of applied sciences degree in business administration (Diplom-Betriebswirtin (FH)), obtained in 2010; part of the firm's office team since 2024.
Nina Heußner
Geprüfte Rechtsfachwirtin (certified paralegal manager) & legal assistantGeprüfte Rechtsfachwirtin (certified paralegal manager) since 2019 and with the firm as a qualified legal assistant since 2015.
Jessica Hupfer
Legal assistantQualified legal assistant since 2018, part of the firm's office team since 2020.
Charlotte Laschütza
Legal assistantQualified legal assistant since 2011 and with the firm's office team ever since.
Anika Mattersteig
Legal assistantQualified legal assistant since 2016, part of the firm's office team since 2023.
Julia Parusel
Legal assistantQualified legal and notarial assistant since 1999, holds a trainer's certificate (Ausbilderschein), member of the examination questions committee of the RAK Bamberg (Bamberg Bar Association); part of the office team since May 2023.
Marion Scheller
Office teamPart of the office team as an administrative employee since March 2022.
Research assistants & students
Katharina Blaurock
Research assistantStudied law in Würzburg, completing the First State Examination in 2025, now in the Referendariat (legal traineeship); with the firm since May 2022, initially focusing on the Juriskop research project, and now also supporting all other areas of the firm.
Emin Dayan
Student assistantStudied law in Würzburg, now in Heidelberg; has supported the Juriskop project since 2023 and, since its completion, all other areas of the firm as well, above all corporate law.
Adrian Janßen
Student assistantStudying law in Würzburg; has supported the Juriskop project since March 2024 and, since its completion, all other areas of the firm as well.
Seong-Il Jun
Student assistantStudying law in Heidelberg; has supported the firm's team since April 2025, with a particular focus on AI.
Jacqueline Sittig
Research assistantDipl.-Jur. (Univ.), First State Examination 2020, pursuing a doctorate in Würzburg on digital gender-based violence; supported the Juriskop research project from 2022.
Technology & open source
Cedrico Knoesel
Software developerDeveloper of the JunBots, student developer with the firm since 2017, bachelor's in computer science since 2022, currently pursuing a master's degree at Karlsruhe Institute of Technology.
Christine Zwirlein
AssistantCertified office communications clerk (Kauffrau für Bürokommunikation, 2003), with experience in project management, business development, marketing, and graphic design; has supported the FOSS compliance team in particular since May 2024.
Office dogs
Elli
Office dogLabrador, born November 23, 2019, focus areas: petting and treats.
Nelly
Office dogStandard Poodle, born 2020, dependable companion in everyday firm life, likes to knock on doors.
Looking for
the right contact person?
- Address
- Salvatorstraße 21
97074 Würzburg - Phone
- +49 931 6639232
- info@jun.legal