The arbitration team at CMS is active across a variety of sectors, ranging from infrastructure, real estate and construction, to life sciences. Mariel Dimsey heads up the team after rejoining the firm in March 2024, specialising in international commercial and investment arbitrations. Nicolas Wiegand is well-equipped to handle a broad range of  disputes involving joint ventures, sales, and distribution within the energy, technology, construction and infrastructure sectors. Steven Wise advises on the full range of contractual and tortious disputes.

Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

  • ‘CMS is a very strong team globally in dispute resolution and HK is no exception. The HK office is able to call upon CMS's global expertise when necessary, which gives them a tremendous advantage.’

  • ‘Mariel Demsey has returned from the HKIAC to the HK office of CMS, which will be welcome news for the firm. She is very experienced and brings some gravitas to the team.'

  • ‘Collegiate and client focused.’

  • ‘Nicolas Wiegand is a superlative arbitrator, his English language drafting is better than most native English speakers, he is a brilliant lawyer but diplomatic and charming presiding arbitrator. He is one of my most favorite individuals to sit with.’

  • ‘The strong support of the CMS Hong Kong team for international arbitration business helped our company resolve the dispute with a European distributor and effectively cooperated with domestic lawyers.’

  • ‘This is a great team. They are very knowledgeable and responsive. They can be reached anytime when you need help.’

  • ‘Wei, Amy Wen: A great lawyer who is so knowledgeable, responsible, generous, and smart. She would provide the best answers whenever you ask her the questions.’

Key clients

  • PharmaEssentia Corporation

Work highlights

  • Represented PharmaEssentia Corporation in an USD 11 billion ICC arbitration seated in Frankfurt (Germany) seeking damages for, inter alia, delays in obtaining regulatory approval for certain rare cancer indications for a novel bio-pharmaceutical product and other alleged breaches.

Practice head

The lawyer(s) leading their teams.

Mariel Dimsey

Other key lawyers

Nicolas Wiegand, Steven Wise, Andrew Horton, Dr Tom Christopher Pröstler, Amy Wen Wei