CDRC Vienna
:: The Organizers

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Founding Institutions


IBA       VIAC       


The International Bar Association (IBA) is the world’s leading organization of international legal practitioners, bar associations and law societies with a membership of 55,000 individual lawyers and 206 bar associations and law societies spanning all continents.

The Vienna International Arbitral Centre (VIAC) is the premier international arbitration institution in Central and Eastern Europe. The new Vienna Mediation Rules of VIAC can be downloaded here



Association for the Organization and Promotion of the Vienna Mediation and Negotiation Competition
Registered Association Number 034757894
Stadiongasse 2, 1010 Wien   




Ilja Weikum 

Ilja Weikum

Ilja Weikum was born in Bishkek, Kyrgyzstan and grew up in Berlin, Germany. He read his bachelor’s degree in Business and Law at the Technical University of Applied Sciences Wildau. Furthermore, he graduated with an LL.M. in Business and Law with a specialization in international business law at his alma mater. During his LL.M. he spent a semester abroad at the Shanghai Jian Qiao University.

He obtained a substantial amount of international mediation and negation experience during his Master studies. Ilja participated in the second edition of the Lex Infinitum competition in Goa, India. With his team, he obtained three awards and got through to the semi-finals.

Moreover, Ilja participated as an expert assessor for several international mediation competitions (e.g. 6th edition NLIU-INADR International Law School Mediation Tournament, 3rd Lex Infinitum, 5th Bucerius Mediation Competition). Ilja has been a member of the volunteering team of the IBA-VIAC CDRC Vienna completion since 2017.


Lisa El Imshati

Lisa El Imshati

Lisa studied law at the University of Vienna (Mag. Iur. 2019) and International Human Rights Law at the University of Groningen, NL (LL.M. 2020). Currently, she is doing her legal internship at courts in Vienna. She has always been passionate about Human Rights and now chosen it as her career path.
As internationality has always been a big part of her life, she is interested in different cultures and has travelled a lot. Throughout her studies, she worked in law and tax accountant firms, was an active member of ELSA (European Law Students Association) and as well as Amnesty International and became an International Alumni Ambassador for the University of Groningen.
Inspired by her participation in the 13th edition of the ICC Mediation Competition, she volunteered in the 4th Edition of the CDRC in Vienna and has now joined the Organizing Team as Co-Director of the CDRC. As such, she seeks to provide the unique experience she had at the ICC to all the participating students and experts at CDRC.


Organizing COMMITTEE

Alice Fremuth-Wolf (VIAC)

Alice Fremuth-Wolf

Alice Fremuth-Wolf is the Deputy Secretary General of VIAC since January 2012. Having studied law at Vienna University (Mag. iur. 1995, Dr. iur. 2002), Utrecht University (1994) and the London School of Economics and Political Science (LL.M. 1998), she served as an assistant professor at the Department of Civil Procedure Law at the Law Faculty of Vienna University. Before opening her own practice in 2004, she worked with major Austrian law firms and acted as party representative and arbitrator in international commercial arbitration cases. Alice Fremuth-Wolf has authored articles and books on arbitration and also serves as a lecturer for arbitration at the Law Faculty of Vienna University, where she was coach of the Vienna team for the Willem C. Vis International Commercial Arbitration Moot from 2004-2009. She is also a qualified mediator and is a co-organizer of the CDRC IBA-VIAC Consensual Dispute Resolution Competition in Vienna.


Claudia Winkler 

Claudia Winkler is a Negotiation Trainer specialized in training lawyers in the art and science of negotiating – with the other side and for more satisfaction with their own clients. An energetic and creative communicator she blends her variety of top legal educations with her international legal and business experience. Claudia received her Master’s and Doctor’s degree in European and International Law from the University of Linz and her LL.M. from Harvard Law School. Her professional experience reaches from law to government, non-for profit, start-up, university and international institutions. She has worked as the ADR development coordinator with the New York International Arbitration Center (NYIAC) during her time as a Fulbright scholar and is a licensed Mediator in New York. She has been the Director of the IBA-VIAC CDRC Vienna Mediation and Negotiation Competition in Vienna since its inception in 2015. As a trainer ( Claudia has worked with law firms, businesses, conferences and universities in the United States, Europe, Africa, Asia and Australia.


Nikolaus Pitkowitz (VIAC)

Nikolaus Pitkowitz

Nikolaus Pitkowitz is founding partner and head of dispute resolution at Graf & Pitkowitz, Vienna and Vice-President of VIAC. He holds law degrees from the University of Vienna (JD and PhD) and the University of Sankt Gallen, Switzerland (MBL) and is also qualified and certified as a Mediator. Dr. Pitkowitz has been practising law since 1985. His practice, which has always been very international with a strong focus on CEE, initially mainly comprised trans­actional work in the fields of Real Estate and M&A and soon expanded to international dispute resolution. Nikolaus Pitkowitz is considered one of the preeminent Austrian dispute resolution practitioners.


Gary Birnberg

Gary Birnberg is a mediator and arbitrator specialized in international commercial disputes. He is associated with JAMS and listed with other prominent dispute resolution institutions in Brazil, France, Russia and the USA. A Fellow of the Chartered Institute of Arbitrators and a Florida Supreme Court Certified Circuit and Appellate Mediator, he has served as a neutral on hundreds of cases, including complex commercial, multi-party, multi-lingual, high-stakes, cross-border matters administered by the ICC, ICDR, and other prominent bodies. He currently is Co-Chair of the Mediation Committee of the IBA and is Chairman of the French-American Chamber of Commerce of Florida. He holds degrees from the University of Pennsylvania, Boston University School of Law, and INSEAD, and works in the English, French, and Portuguese languages.


Marry Walker

Mary Walker BA Hons LLB, Barrister, has been an ADR practitioner since 1990. During this period, as a member of an independent Bar, Mary has arbitrated, mediated, negotiated, facilitated multi-party, environmental and community disputes, designed dispute resolution systems and provided expert appraisal/expert determinations and facilitated expert panels and provided ombudsman services in respect to thousands of disputes across jurisdictions referred by solicitors, industry and government bodies and corporations, both domestic and international. Amongst other appointments Mary is Chair of the Law Council of Australia Federal Litigation and Dispute Resolution ADR Committee, Chair of the Law Council of Australia International Law Section and Co-Chair of the International Arbitration Committee. Mary is a board member of the Australian Centre for International Commercial Arbitration, Co- -Chair of the International Bar Association Mediation Committee and a member of the International Mediation Institute (IMI) Appraisal Committee. Amongst other appointments Mary was previously a President of the Australian Dispute Resolution Association and a member of the IMI Independent Standards Commission. Mary was awarded the Inaugural Australian Mediator of the Year Award in 2016 by the Australian Disputes Centre, again awarded Mediator of the Year in 2017 and 2018 and was also awarded International Mediator of the Year in 2018 and 2019. Mary was inducted into the Australian ADR Awards Hall of Fame as its Inaugural member in 2019. Mary was sponsored by Harvard to teach mediation with Professor Frank Sander in 1995. Mary is an internationally accredited Mediator and Mediation Advocate with the International Mediation Institute and is an accredited Investor- State Mediator with CEDR, London.


Tat Lim

Tat Lim is an IMI-certified mediation advocate and an IMI-certified mediator.

He has been in practice as a mediation advocate for over twenty years and as a mediator for over twelve years. In the last three years, he has mediated international matters involving oil and gas, construction, commercial and social and environmental disputes.

Tat is a Fellow of the Chartered Institute of Arbitrators, a Fellow of the International Academy of Mediators and a Weinstein JAMS International Fellow. He is on the international panels of many distinguished mediation institutions, including the Singapore International Mediation Centre and AAA-ICDR. He is also a regional consultant and mediator of the Compliance Advisory Ombudsman, International Finance Corporation, World Bank Group and a member of the Global Mediation Panel of the Office of the Ombudsman for the United Nations Funds and Programmes.

WWL has described Tat as “an ‘outstanding’ mediator and a distinguished figure in Singapore mediation”, with his peers having lauded him as “the best in Singapore” for mediation services.

He serves as Chair of the Mediation Committee Advisory Board of the International Bar Association, Co-Chair of the Law Society of Singapore Mediation Committee, Chair of the Society of Mediation Professionals (Singapore), a member of IMI’s Independent Advisory Committee and the Editorial Board of IBA’s Dispute Resolution International.

He has served in the organising committee of the ICC International Mediation Competition and IBA-VIAC CDRC. He is a negotiation trainer for Vantage Partners and teaches mediation for Singapore Mediation Centre and Singapore Institute of Legal Education.

He is married with three children and lives in Singapore.