Fax (852) 2525 1099


Dorothy heads up Zhong Lun’s Litigation and Dispute Resolution practice in Hong Kong. Her practice focuses on complex cross-border commercial litigation and arbitration and international trade. Dorothy has expertise in several specialized areas of law, including commercial fraud, white collar crime, cyber fraud, professional negligence, international trade disputes and enforcement of foreign judgments, contentious trust, probate and estate disputes, cross-border litigation, and family law work.

Dorothy frequently handles Mareva injunctions; enforcement; disciplinary actions against listed companies and its directors and officers by the Securities and Futures Commission; and enquiries by the Independent Commission Against Corruption.

Representative Matters
  • Obtaining a Mareva injunction in Hong Kong ancillary to a worldwide asset freezing order in the United Kingdom
  • Defending a Hong Kong Mareva injunction which was obtained in aid of a multiple foreign proceedings in relation to a high-value and high-profile dispute
  • Applying to the Hong Kong High Court for an order to obtain evidence by way of oral deposition and cross-examination before an Examiner of a Hong Kong witness and for production of documents in aid of foreign court proceedings
  • Acting for an ultra-high net worth art dealer and his company in the Hong Kong High Court in opposing and discharging a multijurisdictional Mareva injunction against our client’s assets of over USD 500 million
  • Acting for the father in a Wardship case involving a Non-Hague Convention country where the mother kidnapped their young children to Hong Kong and successfully returning the children to their home jurisdiction
  • Acting for the Applicants in an inter-country Hague Convention adoption where a new partnership needed to be formed between Hong Kong and the originating state of the child
  • Acting for the Applicants in a private adoption where the child was born out of the Applicant father’s extra-marital affair with a woman who subsequently committed suicide
  • Applying for Putative Father under the Guardianship of Minors Ordinance where parties were never married and the mother of the child wanted recognition of paternity and maintenance
  • Conducting a divorce where the child involved was made a Ward of Card due to very poor relations with the parents
  • Acting in various divorce and custody cases involving domestic violence where non-molestation orders and ouster orders were obtained against the violent party
  • Applying successfully multiple times for the formation of Committeeships under the Mental Health Ordinance where the patient could no longer manage his own assets and finances
  • Conducting a divorce for the high profile shareholder of a large family business where, when the wife claimed against the company’s assets, the other shareholders applied to join in the divorce as Interveners to block the wife’s claims
  • Acting for the sister of one of the divorcing parties of a high net worth divorce who applied as Intervener/Amicus because the assets owned by her were held in name of one of the divorcing parties
  • Representing numerous domestic and international trustees and beneficiaries before all levels of court with extensive success
  • Acting for three trustees in an estates dispute where the estate concerned included a number of hotels in Hong Kong
  • Representing one of the beneficiaries of a late well-known philanthropist in Hong Kong in major trust litigation
  • Acting for a high net worth estate where an intended gift for numerous institutions were misspelt and misnamed in the Will
  • Acting for a PRC investor to register an Arbitration Award obtained from the Beijing Arbitration Commission with the Hong Kong High Court and advising on enforcement measures. The amount in dispute exceeded RMB 7 million
  • Advising on a major trust that was subject to an Injunction in HK and overseas on back to back Injunctions in Hong Kong and Singapore. The case involved values exceeding USD 280 million
  • Acting for a medical practitioner in a High Court medical negligence claim, where there were cross-claims for contribution
  • Litigating a case involving fraudulent removal of jewelry where the client was sued for the value of jewelry over HKD 10 million
  • Assisting in a case involving seizure of goods in China belonging to a client in Ireland where the PRC liquidator seized goods belonging to the client in execution over labour claims
  • Litigating in cross-border disputes between HK, PRC Chinese and Canadian parties involving claims over property
  • Acting for and advising an educational institution in multiple actions in the High Court and Labour Tribunal, defending claims of unlawful dismissal of a quasi-government officer and bringing counterclaims against the officer for breach of fiduciary and management duties
  • Acting for an individual in proceedings against a shipping line for unpaid entitlements, and defending claims for breach of fiduciary duties
  • Acting for a client in a dispute involving sale of shares and a property dispute in China
  • Acting for a client in a case involving shipping and carriage of goods between Hong Kong and China
  • Acting for a client in a dispute involving carriage and sale of industrial products involving PRC parties and Japanese interests
  • Assisting numerous clients in recovering funds for victims in cyber fraud cases
  • Acting for Russian interests in a dispute over failure to transfer shares, including application to obtain injunctions

Professional Affiliations
  • Director of Board of Directors of TerraLex, one of the world’s leading international network of independent law firms
  • Member of the prestigious International Academy of Financial Crime Litigators (by invitation only)
  • Member of the International Association of Defense Counsel (IADC) (by invitation only)
  • Associate Member of the Chartered Institute of Arbitrators, U.K.
  • Past Committee Member of the National Asian Pacific American Bar Association (NAPABA), International Law Committee

  • “Crypto Fraud and New Generation Fraudsters”, C5 Conference, Hong Kong, June 2019
  • “Hong Kong/Asia: A popular destination for funds from cyber-fraud”, C5 Conference, Geneva, March 2019
  • “North Asia Legal Update: Discussing Recent Legal Developments by Country”, Asian Regional Meeting
    Hong Kong, October 2017
  • “Divorce, Nuptial Agreements and Trusts: Helping you Answer your Client’s Questions”, Bank of Montreal
    Hong Kong, July 2017
  • “Transfer Pricing – Highlights for Hong Kong”, International Law Symposium
    National Asian Pacific American Bar Association, Kansas City, Missouri, United States, November 2013
  • “Succession Planning for High Net Worth Clients”, Courses & Seminars Ltd, Hong Kong, December 2012
  • “Cross-Border Insolvency Cases: Avoiding Monumental Disasters”
    National Asian Pacific American Bar Association, Washington, United States, November 2012

  • Co-author, “Foreign and International Litigation”, Zhong Lun Horizon, December 2013 Issue

“[Ms. Dorothy Siron] has very in-depth knowledge of the Hong Kong Court procedures. I’m sure she’s an advocate in her own right. She is very sound tactically, and steady, with a wealth of experience. She would be our first choice.”

Chambers Asia Pacific 2017


Chinese (Cantonese)
Chinese (Putonghua)



Litigation and Dispute Resolution
White Collar Crime
Securities Regulatory and Enforcement
Family Law


Hong Kong

Barrister and Solicitor (non-practicing)
British Columbia, Canada

Solicitor (non-practising)
England and Wales


LL.B., University of Hong Kong
Hong Kong

P.C.L.L., University of Hong Kong
Hong Kong

Joint Accreditation, University of British Columbia