Jonathan Ellis is a forensic accountant with nearly two decades of experience. He has been appointed as an expert on more than 25 occasions.

The “excellent” Jonathan Ellis is “an experienced testifying expert in international arbitration matters”. He is “charming, calm and collected” and “very good at expressing himself, both verbally and in writing”.

WWL Thought Leaders Global Elite – Arbitration Expert Witnesses 2023

Jonathan has acted as expert on matters before the UK and Singapore High Courts as well as in ad hoc, SIAC, LCIA, ICC, HKIAC, UNCITRAL and ICSID arbitration forums. He has provided oral testimony on numerous occasions, in both court and arbitration, and has been engaged as a tribunal appointed expert.

Jonathan has advised and supported clients in mergers and acquisitions transactions, corporate restructuring, financial reporting, and expert determination. He is experienced across multiple sectors including energy, power, pharmaceutical, mining, and manufacturing. His consulting experience also includes advising two utility suppliers in the Middle East, in respect of both water and power.

Jonathan specialises in the assessment of complex damages and contentious valuations, in particular in the context of disputes, for litigation, arbitration, and expert determination purposes. He is also experienced in conducting independent accounting investigations and reviews.

Jonathan holds a master’s in accounting and management science and is a fellow of the Institute of Chartered Accountants in England and Wales and the Asia Pacific Institute of Experts. He is a member of the Association of International Energy Negotiators and the thought leadership group of the Singapore ICC Arbitration Group.