Martello is an independent, expert-led firm supporting the legal sector and its clients on complex disputes and high-stakes matters. We operate across construction, financial services, energy, insurance, trade finance, commodities and information technology. Our work is delivered by a core group of senior experts, complemented by a carefully curated global panel of independent specialists, all operating to a single, rigorous standard of independence and quality.
Martello’s directors have a deep practical understanding of the financial services sector, from foreign exchange to investment fund management, fixed income trading to banking regulation, and M&A to lending.
The construction practice at Martello, founded by David Barry, and led internationally by Juan Sáez delivers independent delay and project management expertise.
Martello’s team of seasoned energy professionals span the oil and gas value chain, LNG, contract negotiation, and renewables, helping to navigate the industry's complexities to deliver practical and effective solutions.
Led by a team of industry professionals, our insurance experts have extensive knowledge in insurance claim disputes, policy interpretation, risk management, and underwriting practices.
Trade finance plays a critical role in international trade, helping businesses mitigate risks and secure financing. Martello’s experts provide comprehensive guidance across the full range of trade finance instruments and products globally.
Our team offers unparalleled expertise across global commodity markets, including energy, base and precious metals, and agricultural commodities.
Our information technology sector was established by leading IT industry professionals with expertise across cybersecurity, data management, artificial intelligence, blockchain and cloud computing.
Martello is trusted by a long-standing client base on complex matters requiring independent expert judgment.
Global clients
Trusted experts
Expert appointments
Reports completed
Testimonies given
Martello’s experts comprise a core group of senior, in-house practitioners, complemented by a carefully curated global panel of leading independent specialists.
Before any expert is onboarded, Martello undertakes a rigorous and structured assessment process, including a detailed review of subject-matter expertise, professional track record, independence considerations and reputational standing, supported by independent references.
Our expert cohort is deliberately deep and diverse. For each engagement, we identify and put forward the most appropriate experts based on the specific requirements of the matter, enabling clients to assess and select individuals with confidence that all candidates meet the same high standard of quality, independence and judgment.
Learn more about our experts
Our team brings a wealth of experience in ensuring the accuracy, quality and integrity of court-ready, scrutiny-ready work.
Working alongside senior experts, our team provides comprehensive wraparound support that enables objective and independent assessment, precise drafting and confident testimony, while also contributing to Martello’s commitment to developing and sustaining the next generation of leading experts.
Meet the team"We have worked with Martello on several high-value and complex financial services disputes. They have sourced high-quality experts, in one case at short notice, and delivered a strong, nuanced reports, as well as providing a collaborative and responsive service."
"We have very much appreciated the service from the whole Martello team: they have been responsive, diligent and adept at handling the complex issues they have been instructed on."
"We found Martello to be very professional and its employees extremely friendly and easy to deal with."
Martello provided an expert witness report on market pricing of the commodity Palm Olein, in […]
Martello were instructed on behalf of a gas trading company to provide an expert witness […]
Martello were instructed on behalf of a bank to provide an expert witness report in […]
Martello was engaged by a bank’s compliance team to review 27 trading alerts in relation […]
Martello were instructed on behalf of a metal trading company to provide an expert witness […]
Martello were instructed on behalf of a petrochemicals company to provide an expert witness report […]
Martello were instructed on behalf of an individual in a dispute relating to the services […]
Martello were instructed on behalf of a commodities trading company in order to provide an […]
Martello were instructed on behalf of a multinational bank to provide an expert witness report […]
Martello was appointed to provide independent expert witness services in a dispute regarding the value […]
Martello were instructed on behalf of a commodity trading company to provide an expert witness […]
Martello were instructed on behalf of a Dubai-based specialist brokerage firm to provide an expert […]
Hormuz in Crisis?
The judgment for Hellenic Republic v Wilmington Trust (London) Limited [2026] EWHC 1049 (Comm) has been handed down
Martello strengthens senior team with the appointment of Juan Sáez as Senior Partner