Industrial Engineering Expert Witness Services
The Manderstam International Group has amongst the most versatile teams of production engineers possible.
Trusted Legal & Technical Engineering Consultants
Our production engineers have proven track records in management across a complete spectrum of heavy industry to light engineering, in the metallurgical process industries and in both volume and batch manufacturing. Furthermore our litigation experience for industrial clients at the High Court and International Court of Arbitration is extensive.
Our Clients




Our Accreditations

Industrial Engineering Expertise
- Heavy engineering:
- Oil and petrochemical
- Mining
- Shipbuilding
- Steel and metallurgy
- Machinery manufacturing
- Light engineering:
- Consumer product manufacturing
- Electronics
- Household items and furniture manufacture
“Peter
I just wanted to thank you for all of your hard work in preparing for the case against XXX and for giving evidence at the trial. I know it must have been a little stressful but thought you performed really well.”
Partner at Bond Dickinson, Newcastle UKMay 2013
“Dear Peter,
I wanted to thank you again for all your help and all the time you put in preparing for the hearing. I know cross-examination isn’t fun, but on the whole I thought you went well and you stood your ground.-- I have enjoyed working with you and learning just enough about LPG plants to be dangerous.”
Counsel at Pickering Hale and Dorr LLP Washington DC USAApril 2015
“Dear all,
Congratulations on a successful week and many thanks to each and every one for the valuable contribution.”
Management at Saipem ContractorsFrance and Italy - October 2016
Thank you so much to you and all your team for all your hard work on your report. We think it is a very good piece of work.
Barrister at Keating ChambersDecember 2016
It has been great working with you and likewise hope we will have the chance to do so again in the future!
Barrister at Gide Loyrette Nouel A.A.R.P.I.Paris, 30 Jan 2017
A belated thank you for all your work over the past 18 months or so. It has been a pleasure to work with you on what has been a demanding case from a technical and forensic perspective and the clients were helped tremendously by your ability to ferret out inconsistencies in the documentation / photos. I hope you enjoyed the experience of giving evidence notwithstanding the attempted attacks on your credibility and independence. We and counsel felt that you did a very good job in the witness box and managed to deal effectively with all the attacks.
Partner at Bird and BirdLondon-April 2017
The work done was to a high standard and the output met our requirements as well as the needs of our legal team.
Manufacturing Operations Director, GW Pharmaceuticals April 2017
Thanks so much to both of you for all your efforts and hard work for us.
Counsel at Norton Rose Fulbright LLPLondon-October 2017
Thanks for all your hard work on the case over the last year.
I was very impressed by your performance under cross examination and in the hot tubbing session. You got the tone absolutely spot-on in terms of explaining your position with authority whilst recognising your obligations to be a neutral expert.
The client was also very impressed – which, after all, is the main thing!
Partner at Holman Fenwick Willan LLP,London-December 2017
“Peter,
good presentation, well done and thanks.”
Partner at Decimus Fearon LLPLondon, November 2019
A quick note of thanks for your guidance, expertise and patience with us throughout this process. You are a consummate professional and we sincerely appreciate all that you contributed to this effort.
Partner at Freehill Hogan & Mahar LLPNovember 2019
“Dear Mr Lumley,
Many thanks for your report, which I have read through. It is immensely helpful and clearly set
out. I appreciate that you do not have some of the key documents that you would normally
expect to see but have still produced a very cogent narrative that accommodates the gaps in
information.”
Associate at DAC Beachcroft LLP,May 2020
“Dear Peter,
We succeeded on the XX claim and partly on the delay claim. Please find attached the judgement. Thank you again for all of your help, which was much appreciated.”
Associate at Reynolds Porter ChamberlainLondon June 2020
“Dear Peter,
Thank you for your assistance yesterday at the Hearing, it was very much appreciated……your evidence was invaluable and I thank you for your assistance in this matter”.
Patent Attorney, Hutchinson IP Limited, Southport UKDecember 21
“Dear Peter,
Please see attached [...] decision in the [...] adjudication. He has unequivocally decided in
Bilfinger’s favour and this is in no small part to the clarity of your report.
Legal director, Hill Dickinson LLP,September 2020
"Thank you very much for your help with the wider case-it has been a pleasure working with you!”
Associate, Macfarlanes LLP, LondonSeptember 2022
Telephone call to thank Mr Lumley and the Manderstam team for the excellent and professional performance in the preparation of the expert reports and in particular our performance (Mr Lumley and Mr Sellers) at the hearing. He said they could not ask for more and it was a credit to ourselves and Galliford Try. He complimented us on our hard work, enthusiasm and grip of detail.
Operations Director, Galliford Try, Hinckley, Leicestershire UKOctober 2022
“Peter, Graham,
Thank you very much for all your hard work on the case which is contributed in no small part to the result.
Best wishes and I hope we can work together again in the future.”
Legal Director, Pinsent Masons, Manchester June 2023
“XX do not wish to contest your evidence and so you are not required to attend the arbitration.
I cannot thank you both enough for everything you have done on this case”
Partner at Clausen Miller LLPLondon, February 2024
Our Expert Witness Services Includes
Expert advice and independent expert opinion
Site and equipment surveys
Process design reviews
Review of construction records
Examing compliance issues
Investigation of process and mechanical design defects, disruptions
60 Years Of Industrial Experience
Our engineers are a problem-solving “think tank”, with knowledge of overcoming production and cost bottlenecks.
Manufacturing Technique Expertise
- ✓ Just-in-time (JIT) manufacturing and production
- ✓ Work-in-progress (WIP) manufacturing
Computer-aided
Manufacture
- ✓ CAD expertise
- ✓ CAM expertise
ISO Quality
Assurance
- ✓ ISO 9001
- ✓ ISO 9002
- ✓ Product liability exposure advice
Our Industrial Engineering Experience
Global knowledge and implementation
View our industrial engineering experience
East Africa
- Pre-feasibility study and a feasibility study into the 750,000 tonnes per annum expansion at Mugher Cement Factory near Addis Ababa with an the option of a greenfield site alternative at Dire Dawa in northern Ethiopia. The study included the full geological survey of the limestone, gypsum, pumice and clay sites including complete borehole and laboratory analysis followed by reserve estimation and quarry design. MIGL undertook the conceptual design of the process requirements leading to the preparation of tender documents for international equipment supply and construction.
- A study of the cement packing and associated departments of newly privatised cement company. Implementation of improvements to bulk cement, loose bag and palletised product loading and warehousing and distribution,
- The initial study to examine the potential for the acquisition of and/or investment in, the ROMCIM cement group.
- Feasibility study of new capacity required to meet Zambia's future growth in cement demand. Assistance in producing a related business plan. Study of Mbeya cement demand. Assistance in producing a related business plan. Study of Mbeya cement works Tanzania to determine the viability of acquisition.