Pryles, who is the first non-Singaporean to be appointed to the position, sat as an arbitrator in 200 cases in Asia, Europe, North America and Australia, which have involved construction, commercial, technology-transfer and joint venture disputes.

He is an expert on International Criminal Court (ICC) and ad hoc arbitrations, and has heard matters under the rules of the London Court of International Arbitration, the Singapore International Arbitration Centre and the Hong Kong International Arbitration Centre.

Pryles has extensive experience as a projects lawyer and has been a principal advisor to the former state government in Victoria on restructuring, corporatisation and privatisation in the gaming, electricity and water sectors.