Expert Witness Services in Process and Industrial Engineering

80 years experience in over 90 countries delivering expert witness and litigation services to the High Court and International Court of Arbitration.
  • We are a “Boutique Expert Consultancy” with a top quality multidisciplinary engineering team that has been together for over 25 years – we are not an “expert supermarket”.
  • We are practising engineers with extensive technical expertise from over 40 years’ experience in the process and industrial engineering sectors. Manderstam is a private company that was formed in 1941 and is now 80 years old.
  • We have a top-quality reputation for producing incisive expert reports that has been gained in the last 25 years, with over 85 expert cases and giving oral evidence 34 times in Mediation, the UK High Court and International Arbitration.
  • We have been instructed by most of the international and domestic law firms with excellent references.
  • We have accreditation with the major expert witness registries such as the Expert Witness Institute (EWI), Expert Witness, JS Publications and the consultancy trade association, British Expertise.

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 Expert Witness Services

Process Engineering

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

Industrial Engineering Expert Witness Services

Industrial Engineering

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

Food, Fibres & Agriculture Expert Witness Services

Food, Fibres & Agriculture

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

Mineral & Metallurgy Expert Witness Services

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. To see the interactive map please click on the map or visit the Global Experience page
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