Allen specialises in commercial dispute resolution. He represents clients in a wide range of matters including banking, company, construction, director and shareholder disputes. Allen also acts for clients in investigations by various regulatory authorities.
Allen was appointed Young Amicus Curiae by the Singapore Supreme Court in 2017 and was called upon to assist the High Court on novel points of law in TYA v TYB  3 SLR 1170.
Allen graduated Summa Cum Laude from the Singapore Management University where he won the Emeritus Professor Gerald Dworkin Prize for the Best Student in Intellectual Property Law and the Stamford Law Prize for the Top Student in Financial & Securities Regulations.
Allen is active in the Singapore Courts, has represented clients in arbitrations, and has also acted for clients in regulatory investigations. Notable matters include:
- Defending a bank against claims by investors who suffered losses due to the Madoff Ponzi scheme. This case involved the novel question of the standard of care owed by the bank when conducting due diligence on financial products, and whether the bank had met this standard.
- Defending a bank against claims made by its customers for fraudulent and negligent misrepresentations and mis-selling of financial products.
- Successfully obtained Banker’s Trust order, gagging orders and sealing orders from the Singapore Courts in the unravelling of a multi-jurisdictional fraud, and the recovery and tracing of the proceeds.
- Defending a sub-contractor in High Court proceedings relating to the failure of high voltage power cables, power cable joints, and sealing ends.
- Acting on behalf of a multinational company in a joint-venture dispute over the valuation of an Indian company involving issues of Indian tax law and the application of technical accounting practices.
- Acting in an arbitration involving alleged breaches of an agreement for the sale and purchase of aerial target drones.
- Acting on behalf of a Korean claimant against two Chinese respondents in an arbitration in respect of an agreement for a mobile game distributed in multiple countries.
- Acting for a company in investigations conducted by the Monetary Authority of Singapore into whether the company was conducting an insurance business.
- Acting on behalf of a bank in investigations by the Inland Revenue Authority of Singapore for tax avoidance under section 33 of the Income Tax Act (Cap. 134). The matter involved the bank’s tax treatment of complex financing arrangements offered to a multinational group of companies.
Reported and Unreported Judgments
- TYA v TYB  3 SLR 1170
- Tradewaves Ltd and others v Standard Chartered Bank and another suit  SGHC 93
- Member, Singapore Academy of Law
- Member, Law Society of Singapore
- Contributed to Woon’s Corporation Law. Updated chapter on “Audits and Accounting”
- Contributed to Halsbury's Laws of Singapore – Vol. 12 (2017) Finance and Banking. Updated Chapter 2, “Business of Banking”
- Contributed to chapter on “Legal Profession” in the Singapore Academy of Law Annual Review of Singapore Cases, (2013) 14 SAL Ann Rev 452.