Our Experts

Jonathan Humphrey

Partner

Highlights

Chartered Accountant and fellow of the Institute of Chartered Accountants in England and Wales.
Testified in cases with disputed values up to US$1.5 billion.
Proven as a credible witness under cross-examination, including concurrent evidence.
Regularly appointed as the expert on matters in Asia, Australasia, Europe, Africa and the Middle East.
Specialises in forensic accounting and the quantification of damages.
Regularly recognised as a Global Elite Thought Leader by Lexology Index.

Services

Industries

Drawing on extensive experience as an expert witness, Jonathan Humphrey is particularly sought after in damages and quantum matters for his “great command in quantification principles” and ability to “review and analyse extensive documentation, distilling complex information into clear valuation reports within demanding timeframes”.
Lexology Index - Consulting Experts - Financial Advisory and Valuation - Quantum of Damages - Global Elite Thought Leader

Expertise

Jonathan Humphrey is a Chartered Accountant with over 25 years of experience in forensic accounting. He has been appointed as an expert more than 60 times in commercial and investment treaty cases, dealing with matters of damages and quantum.

Jonathan has acted as an expert witness in multiple forums, including international arbitration under ICC, ICSID, UNCITRAL, LCIA, SIAC, DIAC and HKIAC rules, court litigation and mediation. He has given oral evidence in commercial and investment treaty cases with disputed values of up to US$1.5 billion and has also delivered concurrent evidence (hot-tubbing).

Jonathan’s expert commissions cover a range of issues including the quantification of lost profits, business valuations and the assessment of damages relating to class actions, professional negligence, insurance claims, business interruption and post-acquisition disputes. His forensic accounting expertise includes fraud, forensic, intellectual property and regulatory investigations.

Professional recognition

Lexology Index

Consulting – Financial Advisory and Valuation – Quantum of Damages – Global Elite Thought Leader
Arbitration – Global Elite Thought Leader
Construction – Thought Leader
Commercial Litigation – Thought Leader
Investigations – Forensic Accountants – Highly Recommended
Consulting – Forensic Accountant
Australia and New Zealand – Arbitration, Construction, and Investigations Forensic Accountants

Jonathan Humphrey is a go-to construction expert witness, lauded as “an experienced expert witness known for clear, balanced and well-reasoned evidence”. His expertise spans damages quantification, forensic investigations and regulatory matters, with notable experience giving oral evidence in high-stakes arbitration and litigation proceedings across international construction disputes.

Lexology Index - Australia and New Zealand - Construction Expert Witnesses

Background

Jonathan began his career at one of the big four accounting firms where he worked in their forensic accounting group for eight years before working for expert services firms for 12 years. He has experience in Europe, Africa, the Middle East, Asia and Australasia, working in a myriad of sectors, including construction, financial services, IT and telecoms, media, natural resources, oil and gas, power and utilities, pharmaceutical and retail.

Jonathan holds a degree in economics and is a fellow of the Institute of Chartered Accountants in England and Wales. He is regularly recognised by Lexology Index for his experience in the quantum of damages, arbitration, litigation, construction and insurance matters.