ao link
Who's Who Legal
Who's Who Legal

Global Leader

Arbitration 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say

"A truly international lawyer who bridges the common law and civil law divide masterfully"
"She is a very strong advocate - clear and efficient"
"Perhaps the smartest lawyer I have ever worked with"
"Impeccable judgement and meticulous analysis"


Mariel is an international commercial and investment arbitration specialist at CMS Hong Kong. She is the Co-Head of CMS International Arbitration and has over 15 years' experience acting as adviser and advocate in numerous international arbitrations covering a wide range of legal systems and industries, including post-M&A, distribution and supply, infrastructure and construction, and has particular expertise in the field of investment disputes. She regularly sits as arbitrator and has experience as arbitrator under the HKIAC, ICC, KCAB, and DIS Rules, and in ad hoc disputes. She has also acted as party-appointed expert on arbitration matters. She is on the HKIAC List of Arbitrators, the AIAC Panel of Arbitrators, and the KCAB Panel of International Arbitrators.

Mariel is an Australian lawyer and Hong Kong solicitor, and received an LLM degree from the University of Cologne and a doctorate in law (Dr iur), summa cum laude, from the University of Basel, both in investment arbitration. She worked with leading international and US law firms in Germany and the ICC International Court of Arbitration in Paris, before moving to Hong Kong in 2016.

Mariel speaks and publishes regularly on international commercial and investment arbitration, and international commercial law topics. Her recent publications include a commentary on the UNCITRAL Transparency Rules and a casebook on international sales law, now in its third edition. She has led talks alongside the HKIAC and has taught international arbitration at the Universities of Bonn and Frankfurt.

Alongside her arbitration practice, Mariel is involved in various professional organisations. She is a co-chair of the HK45 Committee and a member of the Women in Law Hong Kong (WILHK) Committee. She is also actively engaged in diversity and inclusion initiatives in Hong Kong and the region.

Mariel is fluent in English and German.

Law Business Research
Law Business Research Ltd
Meridian House, 34-35 Farringdon Street
London EC4A 4HL, UK
© Law Business Research Ltd 1998-2021. All rights reserved.
Company No.: 03281866