Our Team

  • This is our recipe for success

By far the most important reason for our success are the highly motivated staff. They will be there for you every day with great expertise, professionalism and enthusiasm. Learn more about the members of our team below.

  • Dr Heiner Kahlert

    Attorney at Law
    • Commercial and Investment Arbitration
    • Litigation and Arbitration in Sports
    • Legal advice to the sports industry (particularly on association regulations, antitrust issues, data exploitation/sport betting, other complex contracts and player transfers)
    • Advice on contract, commercial and corporate law

    Dr Heiner Kahlert acts as counsel (before state courts and arbitral tribunals), arbitrator and assistant to arbitral tribunals in complex domestic and international proceedings.  The cases handled by him involved inter alia the CISG, energy delivery contract, commercial and corporate law, IT projects and investment protection.

    Heiner’s broad expertise includes ad hoc arbitrations (including under the UNCITRAL Rules) as well as institutional arbitral proceedings administered by the ICC, AAA/ICDR, DIS, HKIAC and ICSID. He was repeatedly selected by “Who’s Who Legal” as a “Future Leader” in the area of Arbitration (Germany).

    In addition, Heiner specialises in arbitration proceedings in sports (before CAS and DIS-Sport) as well as dispute resolution bodies of sports federations. In particular, he has vast expertise in dealing with financial disputes, anti-doping and disciplinary proceedings as well as issues concerning association law.

    Furthermore, as head of the case management team, Heiner has administrated hundreds of cases at the Basketball Arbitral Tribunal (BAT).

    Another focus of Heiner’s work is advising international and national sports federations and individual athletes. He advises in particular on association regulations, antitrust issues, player transfers and complex contracts (e.g. host contracts, sponsoring contracts and contracts on the exploitation of data, in particular in the field of sports betting, as well as IT-related contracts).

    Moreover, Heiner regularly advises on contract, commercial and corporate law, in particular for Start-Ups in the areas of CSR, media and IT law. 

    • Recognised by Who’s Who Legal as „National Leader – Sports and Entertainment (Germany)” in 2021 
    • Recognised by Who’s Who Legal as „Future Leader – Arbitration” in 2019, 2020 and 2021 
    • Recognised by the German Institution of Arbitration with the “First Prize of the Sponsorship Award” in 2015/2016 
    Notable Cases
    • Representing an English metal trader in proceedings against a Central African mining company before the ICC International Court of Arbitration in Paris
    • Chairman of an arbitral tribunal in ad-hoc proceedings (German Civil Procedure Code) between a large insurance group and an insurance agent
    • Challenging a presiding arbitrator before the Munich Court of Appeals in construction arbitration proceedings
    • Arbitrator in several anti-doping arbitration proceedings before the DIS Sports Arbitration Court (DIS-Sport)
    • Representing the International Speed Skating Union (ISU) in the proceedings against Claudia Pechstein before the German courts
    • Representing Atletico Madrid before the Court of Arbitration for Sport (CAS) in relation to transfer sanctions
    • Representing Panathinaikos Athens before the Court of Arbitration for Sport (CAS) in relation to a damage claim of USD 40 million
    • Comprehensive advice to the International Basketball Federation (FIBA) with a particular focus on regulations and contract law matters
    • Advising the International Volleyball Federation (FIVB) on antitrust law, disciplinary proceedings and financial disputes
    • Advising the umbrella organisation of international sports federations (GAISF), inter alia on their Statutes
    • Advising individual athletes (e.g. Xabi Alonso, Arturo Vidal or Dennis Schroeder) in sports law and other matters
    • Advising an international sports federation on multiple contracts concerning streaming rights and the exploitation of data, in particular for betting purposes
    • Member of the Governance Reform Group of the International Boxing Federation AIBA

    German, English, French (reading knowledge), Arabic (basic knowledge)

    Career History

    2019 – present
    Managing Director of Martens Rechtsanwälte

    2011 – 2014
    Completed a doctorate at the University of Zurich

    2010 – present
    Lawyer at Martens Rechtsanwälte

    2008 – 2010
    Legal clerkship at the Hanseatic Higher Regional Court of Hamburg, including traineeships with White & Case (Hamburg), CMS Hasche Sigle (Hamburg), Beiten Burkhardt (Munich) and the German Embassy in Cairo, Egypt

    2007 – 2008
    Worked as a freelancer for Taylor Wessing and “i.e. – office for Expertise in Information Law” (both in Hamburg)

    2003 – 2007
    Studied law at Bucerius Law School in Hamburg and at the University of Wellington

    • German Institution of Arbitration (DIS)
    • London Court of International Arbitration (LCIA)
    • Swiss Association for International Arbitration (AIA)
    • DIS40 – German Initiative of Young Arbitrators (Regional Coordinator 2014-2017)
    • ASA Below 40 – Young Practitioners Group
    • Young ICCA (International Council for Commercial Arbitration)
    • Young Arbitrators Forum of the ICC (International Chamber of Commerce)
    • ICDR Young & International (International Centre for Dispute Resolution)
    • Young International Arbitration Group (YIAG)
    • Panel of Arbitrators of the Cairo Regional Centre for International Commercial Arbitration (CRCICA)
    • Network of Young Sports Lawyers (Junges Netzwerk für Sportrecht) (Co-Founder)
    • Arab Legal Forum
    Speeches and Lectures

    Visiting Lecturer for the FIFA Executive Programme in Anti-Doping
    Visiting Lecturer for the CIES FIFA Master
    Lecture at the Goethe-Universität Frankfurt within the Framework of the Key Qualification “Conflict Resolution in National and International Sport”

    2019 – present
    Visiting Lecturer for the Master in International Sports Law at the Higher Institute of Law and Economics (ISDE), Madrid, Spain

    Speaker on ex aequo et bono arbitration at the SCAI Innovation Conference, 2 February 2017; 
    Visiting Lecturer for a Moot Court at Bucerius Law School in Hamburg, 17 and 27/28 July 20172010 – 2012
    Lectures on Sports Law at the Technical University of Munich

    Speaker at the Spring Meeting of DIS40 in Hamburg on the Topic “Der Court of Innovative Arbitration – Zurück in die Zukunft der Schiedsgerichtsbarkeit” [The Court of Innovative Arbitration – Back to the Future of Arbitration], 26 April 2016; 
    Visiting Lecturer for “Arbitration Clauses for Athletes, Clubs and Associations” at Bucerius Law School in Hamburg, 22 und 29 July 2016

    Lecture on sports arbitration at the University of Passau, 23 May 2014

    • “Mehr Meinungsfreiheit im Sport”,

      Dr Heiner Kahlert / August 2021

      NJW 2021, S. 15 (co-author: Dr Marie-Christin Bareuther)
    • “New York Convention”,

      Dr Heiner Kahlert / January 2019

      Weigand/Baumann, Practitioner’s Handbook on International Commercial Arbitration, 3rd edition 2019, p. 1572-1777 (co-author: Prof. Dr. Ulrich Haas)
    • “Chapter 8: Germany”,

      Dr Heiner Kahlert / June 2016

      Carl Rohsler (ed.), The Gambling Law Review, 2016, pp. 82-93
    • “Vertraulichkeit im Schiedsverfahren”,

      Dr Heiner Kahlert / June 2015

      Mohr Siebeck, 2015, 438 pages
    • “Privacy and Confidentiality”,

      Heiner Kahlert (co-author) / 2nd ed. 2015

      in: Böckstiegel/Kröll/Nacimiento (eds.), Arbitration in Germany – The Model Law in practice, 2nd ed. 2015 (co-author: Prof Dr Ulrich Haas)
    • “Confidentiality in Arbitration – A Tale of Doves, Chromatics and European Divides”,

      Heiner Kahlert / November 2013

      European International Arbitration Review, Vol. 2 Issue 1 (2013), pp. 27-40
    • “(In)voluntary submission to Arbitration in Germany, Switzerland and beyond”,

      Dr Heiner Kahlert / November 2013

      European International Arbitration Review, Vol. 2 Issue 1, 2013, pp. 175-190
    • “Anmerkung zu Schweizer Bundesgericht: Zivilrechtliche Beschwerde gegen Schiedsspruch ohne Begründung”,

      Andreas Zagklis, Heiner Kahlert / July 2013

      SpuRt 3/2013, p. 117 et seq.
    • “Cases C-403/08 and C-429/08 Murphy”,

      Heiner Kahlert (co-author) / April 2012

      19 Maastricht Journal of European and Comparative Law 1 (2012), pp. 110-119 (co-author: Prof Dr Ulrich Haas)
    • “Das “Murphy / Premier League”- Urteil des EuGH – Kein Debakel für Inhaber von Sportübertragungsrechten”,

      Heiner Kahlert / December 2011

      causa sport 4/2011, pp. 323-333
    • “Restrictions by EU Member States on Exclusive Grant of Broadcast Rights on Pay-TV Upheld”,

      Heiner Kahlert, Andreas Zagklis / March 2011

      Entertainment & Sports Lawyer, Vol. 29 Issue No. 1, Spring 2011, pp. 24-26 (co-author: Andreas Zagklis)
    • “Eigenverwaltung des Schuldners”,

      Heiner Kahlert (co-author) / January 2010

       in: Gottwald (Hrsg.), Insolvenzrechtshandbuch, 4. ed. 2010, pp. 1275-1321 (co-author: Prof Dr Ulrich Haas)
    • “Strukturkrisenkartelle als zulässige Reaktion auf die Wirtschafts- und Finanzkrise?”,

      Heiner Kahlert (co-author) / October 2009

      Betriebsberater 2009, 1930-1935 (co-author: Justus Herrlinger)
  • David Menz

    Attorney at Law
    Managing Associate
    • Litigation and arbitration in sports
    • Legal advice in sports (especially with regard to labour law and association law, organisation of sports events and legal issues in eSports)

    David Menz mainly acts as a party representative in sports law disputes. He represents athletes, clubs and sports associations before state courts as well as dispute resolution bodies of federations (e.g.: FIFA DRC, UEFA CEDB, BFV’s internal sports tribunal) and arbitration courts (e.g.: CAS). David has particular experience in the handling of disputes in employment, financial and association law as well as disciplinary cases.

    Another focus of David’s activities is advising stakeholders in the sports industry on establishing agreements and regulations. He particularly provides legal advice to federations on drafting and adapting statutes, internal regulations and contracts for the organisation of sports events. Moreover, David is very familiar with the management of all legal aspects of player transfers.

    A great passion of David is teaching, which is why he regularly gives lectures and presentations at various German universities (TUM, LMU and DSHS) and at various international programmes (CIES/FIFA Master, FIFA Executive Programme in Sports Arbitration). He co-founded and co-hosts the Network of Young Sports Lawyers (Junges Netzwerk Sportrecht (JNSR)) which is aimed at young lawyers who work in or are interested in sports law. Also through this, David supports the sharing of expertise and the exchnge between young sports lawyers in German-speaking countries.

    Furthermore, as Deputy Head of Case Management of the Basketball Arbitral Tribunal (BAT), David is involved in the administration of approximately 160 arbitration proceedings per year.

    Notable Cases
    • Representation of Türkgücü Munich in proceedings against the Bavarian Football Association regarding its participation in the German Cup
    • Representation of an international sports federation in a claim for damages due to alleged violations of personal rights
    • Assisting in the transfer of Alvaro Odriozola from Real Madrid to FC Bayern Munich
    • Representation of Fenerbahce Istanbul in a sports law case before the Court of Arbitration for Sport (CAS)
    • Representation of a Greek first division football club before the CAS against claims for damages of a former player
    • Representation of an athlete in an anti-doping dispute before the CAS
    • Representation of an organiser of national youth basketball leagues in a dispute concerning the validity of a rule limiting the number of foreign players allowed per team.
    • Advising the Drone Racing League on the organization of a competition at the BMW Welt in Munich
    • Representation of 1. FC Köln in disciplinary proceedings before the Appeals Committee of the European Football Association (UEFA)

    German, English, French (reading knowledge)

    Career History

    2017 – present
    Attorney at Law at Martens Rechtsanwälte

    2014 – 2016
    Legal clerkship at the Higher Regional Court of the District of Munich with internships abroad at the law firm Marcin & Lambirth LLP, Los Angeles, USA

    2008 – 2014
    Studied law at the University of Munich

    • Network of Young Sports Lawyers (Junges Netzwerk Sportrecht (JNSR)) (Co-Founder)
    Speeches and Lectures

    2017 – present
    Lecturer for sports law at the Technical University of Munich

    Lecturer for sports law/arbitration at the CIES/FIFA Master program

    Lecturer for sports law/arbitration at the FIFA course on sports arbitration for executives in sports

    Lecturer for sports law/arbitration at the CIES/FIFA Master program

    • “Political protest in football – is it time for a (legal) debate? Analysing FIFA’s regulations and recent actions in the Bundesliga”,

      Maximilian Wegge, David Menz / June 2020

      in LawinSport, June 2020 (https://www.lawinsport.com/topics/item/political-protest-in-football-is-it-time-for-a-legal-debate-analysing-fifa-s-regulations-and-recent-actions-in-the-bundesliga)
    • “Implementing the Organizational Structures of Competitive Sports in eSports”,

      David Menz / 2020

      in: Martin Maties (ed.), eSport-Recht - Politik, Praxis und Wissenschaft im Dialog (Tagungsband der Forschungsstelle für eSport-Recht), 2020, pp. 101-144 (co-author: Dr. Paul Fischer)
  • Maximilian Wegge

    Attorney at Law
    • Law of federations and associations
    • IT and Media law, Digital Business
    • General legal advice in the field of sports, in particular on contract drafting, and on inner association court and disciplinary proceedings as well as arbitration proceedings

    Maximilian Wegge joined the Martens Rechtsanwälte team in March 2019. Previously, during his legal traineeship, he worked for a law firm specialising in sports law. After completing his training, he joined a German commercial law firm in the field of media and entertainment. He therefore has experience in the areas of IT, media law and digital business.

    Maximilian is regularly involved in assisting associations and clubs in sports law matters. He also advises in connection with ordinary court or arbitration proceedings in the area of general civil law as well as corporate and association law. Maximilian is an honorary arbitrator in the arbitration tribunals of the lander Baden-Wuerttemberg and Saarland associations of a political party.

    Notable Cases
    • Advising two IT start-ups on the topics of webshop terms and conditions and data protection
    • Advising an international sports federation on the revision of its athlete agreement and privacy policy
    • Advising an international sports federation on its dispute resolution mechanism for financial disputes
    • Advising a Bundesliga soccer club on the filing of a claim before FIFA’s Dispute Resolution Chamber
    • Representation of a Greek first division soccer club before CAS against claims for damages of a former player
    • Representation of Türkgücü München in a dispute regarding DFB Cup participation before association courts and state courts

    German, English, French

    Career History

    2019 – present
    Attorney at Law at Martens Rechtsanwälte

    2018 – 2019
    Attorney at Law at SKW Schwarz Rechtsanwälte

    2016 – 2018
    Legal clerkship at the Higher Regional Court of the District of Munich with internships at, inter alia, the law firm Lentze Stopper (Munich)

    2012 – 2013
    Semester abroad at Jean-Moulin Lyon III University, Lyon (France)

    2010 – 2016
    Studies of law at Ludwig-Maximilians University of Munich





    • Munich Bar Association
    • AG Sports Law in the German Bar Association
    • DIS-40 – German Initiative of Young Arbitration Lawyers
    • Young ICCA (International Council for Commercial Arbitration)
    Speeches and Lectures

    2019 – present   giving lectures on Sports Law at the Technical University of Munich

    • “Political protest in football – is it time for a (legal) debate? Analysing FIFA’s regulations and recent actions in the Bundesliga”,

      Maximilian Wegge, David Menz / June 2020

      in LawinSport, June 2020 (https://www.lawinsport.com/topics/item/political-protest-in-football-is-it-time-for-a-legal-debate-analysing-fifa-s-regulations-and-recent-actions-in-the-bundesliga)
  • Janet Reinhold

    Office Manager,
    BAT Case Manager
    European Secretary
    • Office management, event management, marketing and electronic data processing management
    • Development and implementation of innovative dispute resolution systems
    • Administration and organisation of various institutional courts of arbitration
    • Further development, planning and implementation of internal projects; devising corresponding training programmes and providing training courses

    As an employee from the very beginning, Janet Reinhold has had a significant influence on our corporate culture. She worked closely with Dr Dirk-Reiner Martens for more than 20 years and played a key role in the founding of our firm.

    Having previously worked for many years in an international commercial law firm, Janet is very familiar with the competent administrative support of international projects, extensive due diligence mandates and arbitration proceedings. There, she also headed up the in-house training team. As part of this role, she supported the programming and enhancement of the firm’s proprietary lawyer software, developed comprehensive training plans and user manuals, and was responsible for the rollout of the software as well as for the training courses in Germany and abroad.

    As office manager of our law firm, Janet keeps all the threads of the office organisation together. She is the first point of contact for our lawyers and clients in all organisational matters. As an impulse generator and project manager, she is also tirelessly committed to the further development and successful implementation of internal and client-related projects. This includes, in particular, the organisation and support of internal and external events, such as the BAT User Conference, as well as the further development and implementation of our IT.

    In addition, Janet has extensive experience in the administration of dispute resolution mechanisms. Since 1998 she has been coordinating the FIBA Appeals’ Panel.  Furthermore, she has been instrumental in the development and continuous expansion of the administrative and technical concept of two institutional arbitration tribunals developed and administered by our law firm: the Basketball Arbitral Tribunal (BAT) and the Court of Innovative Arbitration (COIA). Janet is a case manager and accounts manager for these institutions.


    German, English, French, Russisch (Grundkenntnisse)

    Career History

    2009 – present
    Office Manager at Martens Rechtsanwälte

    2007 – present
    Accounts Manager at the Basketball Arbitral Tribunal (BAT)

    1998 – present
    Case Manger at the FIBA Appeals’ Panel

    1996 – 2009
    Partner’s Personal Assistant and Head of the Secretarial Training Department at Beiten Burkhardt (Munich)

    Advanced Diploma in Administrative Management from the Institute of Administrative Management (Telford, UK)

    1995 – 1996
    Bachelor of Arts degree in European Administration from the University of Lincolnshire & Humberside (Hull, UK)

    1994 – 1995
    Studied at the Merkur Academy (Karlsruhe), qualifying as a State-accredited European Secretary








  • Linda McCracken

    Office Clerk
    • Administrative and Assistance work, Client Relationship and Support
    • Travel Management
    • Bookkeeping / Accounts Payable

    Linda McCracken joined Martens Rechtsanwälte in 2009. She had already worked previously for many years with the firm’s founder, Dr Dirk-Reiner Martens, and his team in an international commercial law firm.

    Thanks to her extensive experience with the work processes in international law firms, Linda has supported the establishment and development of the law firm from the very beginning. As an assistant, she not only supports the entire Martens team but also attaches great importance to the cooperation with the clients.

    Linda is responsible for accounts payable and account management as well as the organisation of all business travel for our team. In addition, she supports the entire office management, especially during events.


    English, German, Spanish (reading knowledge)

    Career History

    2009 – present
    Assistant at Martens Rechtsanwälte

    2006 – 2009
    Assistant at Kirkland & Ellis (Munich)

    2000 – 2005
    Assistant at Clifford Chance (Munich) and qualifying as Buerokauffrau (office clerk)

    1991 – 1998
    Assistant at Beiten Burkhardt Mittl & Wegener (Munich)

    1987 – 1991
    Training as a Legal Assistant at Clifford Chance (London)

    1980 – 1987
    Assistant at Lloyds Bank (London), Clearing and Administration Department

  • Carmen Paulsen

    BAT Case Manager
    Translator and Interpreter
    • Administration of the Basketball Arbitral Tribunal (BAT)
    • Case Managment

    Carmen Paulsen joined the team at Martens Rechtsanwälte in 2011. Since December 2013 she has been a Case Manager to the Basketball Arbitral Tribunal (BAT), which was developed by Martens Rechtsanwaelte. As a case manager,  she is acting as  the link between the parties and the arbitrators in BAT arbitration proceedings. Carmen is responsible for setting and monitoring deadlines for incoming payments and the submission of documents. She is dealing with correspondence to parties and answering general queries regarding the BAT.


    German, English and French

    Career History

    2011 – present
    BAT Case Manager at Martens Rechtsanwälte

    2004 – 2011
    Assistant at Escada AG (Munich)

    2001 – 2004
    Assistant at Beiten Burkhardt (Munich)

    1996 – 1998
    Studied at Ludwig Maximilian University in Munich

    1998 – 2001
    Qualified as a State-certified translator and interpreter, specialising in business and economics (English and French), from the Institute of Foreign Languages in Munich




  • Cendrine Guillon

    BAT Case Manager
    Capacitaire en Droit
    • Eligibility and transfers of athletes
    • Anti-doping-management
    • Administration of the Basketball Arbitral Tribunal (BAT)

    French, German and English

    Career History

    Studied at the Public Institute of Foreign Languages in Munich

    Studied law at the University of Paris 1

    1998 – 2011
    International Basketball Federation (FIBA)

    2011 – present
    Martens Rechtsanwälte (Munich)