Presiding arbitrator or arbitrator in over 180 disputes governed under mainly Civil Law but also Common Law and under major arbitration institution rules including AAA, BANI, HKIAC, ICC, LCIA, LMAA, KLRCA, SCMA, SIAC, TAI and the UNCITRAL. Dr. Ong has also been lead counsel or co-counsel in numerous arbitrations and disputes over a 25 year period. Accredited Arbitrator of over 18 national and international arbitral institutions. He was lead advocate for Perusahaan Gas Negara before the Singapore Court of Appeal in PGN v CRW [2015] SGCA 30 [leading to GAR Awards 2016 Runner-up "Most Important Reported Decision of 2015".] Counsel for PGN in an earlier arbitration that led to CRW v. PGN [2011] SGCA 33, which influenced FIDIC to release its FIDIC Guidance Memorandum in April 2014.

Dr Ong is Queen's Counsel at St Philips Stone Chambers (London); Counsel at Eldan Law LLP (Singapore) and Senior Partner at Dr Colin Ong Legal Services (Brunei). He has extensive court experience and has several important reported judgments in Brunei, England and Singapore. He is regularly instructed as lead counsel in major international commercial, construction, investment and shipping arbitrations including seats in Brunei, China, England, France, Hong Kong, India, Indonesia, Japan, Malaysia, Singapore, Thailand and the UAE.

He is and has been a Visiting Law Professor and has been teaching arbitration and advocacy at various universities including University of Hong Kong; Universitas Indonesia; King's College (London); University of Malaya; Universiti Kebangsaan Malaysia; Queen Mary (London); Padjadjaran University (Indonesia); and National University of Singapore. Has over the course of the last 13 years been teaching the Fellowship courses for both the Chartered Institute of Arbitrators and the Singapore Institute of Arbitrators.

 In Prof Dr Ong's 25 years legal experience, he spent 18 years as arbitrator in various fields including marine related matters, charter party; coal; commodities; marine insurance; offshore oil and gas projects; shipbuilding, ship sale and purchase arbitration, international trade; pipeline construction and upstream oil and gas. Financing work and arbitrator experiences for FPSO and LNG vessels; offshore construction joint ventures; and refinery projects.

 Publications:

Numerous conference papers and articles on shipping, international trade and energy legal issues. Author and co-author of many books on advocacy and arbitration including Costs in International Arbitration; Interim Measures in International Arbitration and others. Editorial board member of major legal journals including Arbitration (Journal of the Chartered Institute of Arbitrators); Butterworths Journal of International Banking & Financial Law; Dispute Resolution International and Maritime Risk International.