Expert Witness Services in Process and Industrial Engineering

Experience in over 85 countries delivering expert witness and litigation services to the High Court and International Court of Arbitration.

Providing Scientific & Engineering Evidence Since 1941

Manderstam offer expert witness services, approved by the UK Law Society, with unparalleled oil, gas and petrochemicals expert witness expertise. All our experts are trained in giving legal evidence by Bond Solon. We also boast enormous engineering consultancy experience.

Provided oral evidence in over 20 cases

Experience in over 60 cases

All experts highly trained in giving legal evidence

Expert Witness: Industry Specialisms

Unparalleled experience in the preparation and presentation of scientific and engineering evidence to the High Court and International Court of Arbitration.

Oil, Gas & Petrochemicals

Expert reports and evidence on design, materials and construction of oil, gas and petrochemical plants and piping.

Chemicals & Fertilisers

Unmatched experience in the engineering and control of major ammonia-urea and fertiliser projects.

Pharma & Bioengineering

Evidence given on design, construction and procurement of pharmaceutical plants and equipment.

Process Engineering

60 years of plant experience across
the world, from oil/gas and plastics
to cement and pulp.

Industrial Engineering

Proven litigation experience across heavy industry to light engineering, from volume and batch manufacturing.

Food, Fibres & Agriculture

Specialist legal and technical expertise in the textile, pulp, food processing, agriculture and agro industries.

Mineral & Metallurgy

Over 50 years experience providing metallurgy and mineral expertise, legal and investigation services across the globe.

Mechanical Design & Quality

Expert reports, ISO assurance and evidence in complex cases on behalf of multinational manufacturing companies.

Environment Health & Safety

Internationally-recognised expertise in policy and regulatory constraints for cost-effective environmental management

Expert Witness Services Instructed By The World's Leading Law Firms

We have been instructed by most of the leading international and domestic law firms, with experience from well over 60 cases and the provision of oral evidence in over a third of these.


  • AIG
  • G A B Robins


  • Arnold, Davies, Cooper, London
  • Berrymans Lace Mawer, London
  • Bar & Karrer AG, Zurich
  • Berwin Leighton Paisner, London
  • Bird and Bird, London
  • Blatchfords, London
  • BP Collins, London
  • Clifford Chance, Paris
  • CMS Cameron McKenna, London
  • Cobbetts, Birmingham
  • DAC Beachcroft, London
  • David Phillips and Partners, Essex
  • Davies Arnold Cooper, London
  • Davies Lavery, London.
  • Deacons, Hong Kong
  • Dentons, London
  • Dickinson Dees, Newcastle
  • DLA, Birmingham
  • DWF, Manchester
  • Freeth Cartwright, Manchester
  • Fried, Frank, Harris, Shriver & Jacobson, Washington
  • Gide Loyrette Nouel, Paris
  • Greenwoods, London
  • Halliwells, London and Manchester
  • Holman Fenwick Willan, London and Qatar
  • Howard Kennedy, London
  • Kennedys, London, Bath and Birmingham
  • Lalive, Geneva
  • Mayer Brown International, London
  • McNulty & Co, Basingstoke
  • Mills & Reeve, Birmingham
  • Norton Rose Fulbright, London
  • Pinsent Masons, Glasgow and London
  • Rawlinson Butler, Crawley
  • Reid Minty, London
  • RPC, London
  • Sandersons, Hull
  • Shadbolt & Co, Reigate
  • Shoosmiths, Reading
  • Simmons & Simmons, London & Dubai, UAE
  • Smyth and Co, Hong Kong
  • Stewarts Law, London
  • Watson, Farley & Williams, Bangkok
  • Wilmer, Cutler, Pickering and Dorr, London
  • White and Case, London

Consultant Engineer Services

Manderstam International Group are fully-independent, and offer internationally-acclaimed engineering consultancy including project management and benchmarking. Extensive client background including BP, Shell, Chevron and British Gas.

Worldwide Expert Witness Clients

Arbitration & Engineering
Expertise across 90 countries

Our work spans numerous countries and continents. We use our intimate knowledge of the oil and gas, petrochemical, pharmaceutical and manufacturing industries (among others) to provide specialist expert witness legal guidance and consultancy.

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"Dear clients and colleagues,

Like all of you, we have been closely monitoring the COVID-19 pandemic since its inception in order to respond as necessary. Our priority is the health and wellbeing of all whom we work with and our wider responsibility of serving our clients. To that end we have implemented a robust, well tested plan which enables us to operate at usual capacity and ensure a high quality service: business as usual in other words.

We wish all our clients good health in these challenging times".

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