Thirty-seven HKA experts recognised in Who’s Who Legal’s Arbitration 2024 analysis

HKA, a leading global consultancy in risk mitigation, dispute resolution, expert witness and litigation support services, celebrates a total of 37 of its experts listed in independent research firm Who’s Who Legal’s (WWL) Arbitration 2024 report, hosted on Lexology.

WWL’s Arbitration 2024 report highlights the world’s leading arbitration experts through an analysis of the market and references given by clients. The 37 listed this year, comprising of five Global Elite Thought Leaders (up two), 27 Global Leaders (up 10), and five Future Leaders (up four), marks a new milestone in listings for HKA. This puts HKA third overall in the performance rankings for arbitration.

“We are thrilled to see the recognition our experts have received in this years Arbitration reports from WWL. We are grateful to all of our clients who took the time to share their feedback; their contributions mean so much to us as we stay committed to our promise of putting the client at the forefront of our dispute resolution services.

To have five Global Elite Thought Leaders this year is also a fantastic testament to our experts’ expertise and talent, and we are proud to see them at the helm of furthering arbitration expert service as a profession. With an additional 16 experts listed in just one year and moving up to third in the table, we feel confident that we will continue to expand in this arena.”

Renny Borhan, Partner, Chief Executive Officer

Global Elite Thought Leaders

Here’s what peers and clients had to say about HKA’s five Global Elite Thought Leaders.

Anthony Charlton is ‘a go-to expert in Paris’ and ‘is a reliable and trusted expert for international disputes’.

Colin Johnson is praised for his ‘incredibly clear, thorough and professional’ work and his ‘fantastic public speaking skills and great analytical mind’.

Jonathan Ellis ‘has it all; work, ethic, credibility and reliability’ and he is noted to be ‘very responsive to concerns and strong under cross-examination’.

Matthias Cazier-Darmois ‘stands out as one of the rising stars in quantum analysis’ and clients can ‘benefit from his ability to conceptualise difficult problems in a way that tribunals can understand’.

Roula Harfouche is known to be ‘very thorough, insightful and collected’ and is ‘one of the best damages experts out there’.

Global Leaders

Here’s what peers and clients had to say about HKA’s 16 Global Leaders.

Andrei Soltan has ‘the ability to simplify complicated and complex issues’, and has ‘great attention to detail and very well prepared’.

Andrew Flower is ‘a very experienced, thoughtful and collected expert’ and ‘is often seen working on very big multinational cases.’

Baoqiang Zheng is noted to be one of the ‘few experts in mainland China who works fluently in Mandarin and English’, and ‘is experienced and very well prepared’.

Bill Haggart’s clients say he ‘presents well and is very persuasive’, and he is ‘extremely organised and provides excellent evidence’.

Colin Russell is noted for his ‘excellent client care skills’ and is ‘very knowledgeable and a pleasure to work with’, and ‘a safe pair of hands’.

David Atkinson’s clients say he ‘produces great work and is always timely’, and ‘his expert reports are great and he is very personable’.

David McIntyre’s clients say he was ‘to the point and really on top of things’ and they were ‘very impressed by David – he’s a true expert’.

Derek Nelson is ‘methodical in his approach to delay and quantum analysis, and delivers a thorough analysis in his report’ and ‘is able to deliver with clarity and has the ability to explain difficult issues in understandable terms’.

Dimitrios Tousiakis is know to be ‘willing to consider every position when reviewing a matter and his reports are always balanced’, and will one day ‘be considered one of the best delay practitioners across the globe’.

Ekrem Kaya is noted to have ‘an excellent attitude that is always geared towards resolution’.

Emyr Evans is ‘precise and asks the relevant questions’ and ‘diligent and thorough’ in his work, with a ‘polite attitude’.

Franco Mastrandrea is praised for being ‘very experienced, measured and seasoned witness’ who is ‘an elite-level expert with fantastic composure and ability to articulate complex matters’.

Gerry Brannigan is ‘a very strong and knowledgeable MEP expert’ whose analysis is ‘well considered and clearly explained’, as well as coming across ‘very well’ in the witness box.

Hamish Clark is ‘well respected’ and a ‘very knowledgeable architect’ who ‘stands out as a user-friendly expert with a clear and uncomplicated communication style’.

John Delaney is ‘an expert who is genuinely independent, credible but also user-friendly’ and ‘has a bright future as a testifying expert’ who ‘grasps the issues quickly and communicates his considerable expertise clearly’.

Jonathan Humphrey is praised for preparing reports that are ‘tribunal-friendly and easy to understand’, being ‘confident when giving evidence and being cross-examined’, as well as being a very ‘user-friendly and credible expert’.

Kenneth J. Kratovil is noted to ‘shown patience, clarity and commitment to his work’ who ‘always takes the time to explain key concepts to his instruction attorney’.

Ken Baker is praised for his ‘wealth of experience that he brings to matters which comes through during his analysis and testimony’ and he is ‘as smart as a whip and is unshakeable in his neutrality as an expert’.

Mark Castell ‘retains great lucidity over complex issues’ and is ‘credible and sound, and gives every reason for the tribunal to appoint him’.

Mark Dixon is ‘technically excellent and incredibly thorough’ who is also ‘incredibly bright, thoughtful and attentive’.

Martin Hicks’ clients found him to be ‘diligent, precise and insightful’, and is noted for being ‘an expert in arbitration and made it easy for non-experts to understand what he was doing’.

Michael Tonkin is found to be a ‘highly responsive and diligent quantum expert’ with ‘a very good understanding of arbitration based on his experience’.

Patrick Hébréard has ‘the ability to provide relevant, swift and concise solutions’ and his analysis is ‘always straight to the point’.

Tim Hart is noted as producing ‘excellent analytics and expert reports’ and gives ‘first-class’ expert testimony.

Timothy Harwin  is praised as being ‘one of the leaders in the market’ with ‘an exceptional eye for detail’ who is ‘strong on the witness stand’.

Tom Kapapa ‘understands the processes well and is able to break down technical matters for the tribunal’ and ‘is easy to work with’.

Troy Dahlberg’s client say he is ‘able to understand and respond to the legal direction of the case’ and is known as a ‘consummate professional who ensures compliance with the best practices’.

Future Leaders

Daniel Jackson is found by clients to be ‘composed and detailed focused’ who can ‘grasp very quickly the core of important issues which allows him to work efficiently under impossibly tight time frames’.

Jana Lefranc is noted to be ‘an excellent expert in damages’ and ‘her attention to detail and the ability not to lose sight of the main themes in the arbitration go hand in hand’.

John Jones is ‘very calm under pressure and performs very well under cross-examination’ and is ‘highly recommended and deals with clients well’.

Macarena Diaz Egnem is found to be ‘an excellent arbitration expert witness’ who has ‘really good credentials and a plethora of experience’.

Olesya Prantyuk is a ‘profound expert in her area’ who has a ‘pragmatic approach and understands her clients’ needs’..

Discover more of our expert witnesses

Browse and search our Expert Centre, our online directory featuring the profiles of our talented and experienced expert witnesses.

Media Contact

Laura Whyte, Global Marketing and Communications Manager

Tel: +44 (0)20 7618 1200


About HKA

Headquartered in the UK, HKA is a leading global consultancy in risk mitigation, dispute resolution, expert witness and litigation support services.

HKA brings a proud record of excellent service and high achievement to bear on today’s challenges. As trusted independent consultants, experts and advisers, we help clients manage disputes, risk and uncertainty on complex contracts and challenging projects. Our advice is impartial, incisive and authoritative.

We work with government agencies, local authorities, contractors, legal firms, and other professional service providers, as well as owners and operators, financial institutions and insurers. HKA’s global portfolio includes some of the world’s largest and most prestigious commissions across a wide range of industries, including aerospace and defence, buildings, energy and natural resources, environment and climate change, financial services, healthcare and life sciences, industrial and manufacturing, marine and shipping, mining and metals, oil and gas, power and utilities, real estate and tourism, sports and entertainment, technology, media and telecomms and transportation infrastructure.

HKA has in excess of 1,000 experts, consultants and advisors across 45+ offices in 17 countries with the skills and experience that are essential to get to the heart of even the most complex issues. Our people have vast first-hand experience spanning all major industries and the world’s most complex megaprojects, as well as an international track record of achieving successful outcomes.

For more information about HKA, visit and connect with us on LinkedIn, X (formerly Twitter, @HKAGlobal) and Facebook.


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