Area Of Expertise

Peter Lumley is an experienced expert witness and consulting engineer in the process and oil & gas industry.

Consulting and expert engineering is a specialist profession that provides skilled independent expertise in engineering, technical support, business, financial and administrative expertise, project management and co-ordination, delivery and many other consulting engineering services.

If you’re looking for an expert witness for a case or a consulting engineer for your next project, look no further than seasoned professional, Peter Lumley.
Mr. Lumley brings a wealth of experience to the oil and gas, pharmaceutical, manufacturing and petrochemical industries, and specialises in several key areas.

Mr. Lumley can offer skilled independent expertise in engineering, technical support, business, financial, administrative, project management, co-ordination, delivery and many other consulting engineering services. Choose from functional services or technical services, depending on your project’s requirements.

An engineering professional

Mr. Lumley has extensive experience in onshore and offshore oil and gas processing, petroleum refining and products, utilities and power generation. He can also offer the following specialisms:

Functional services

  • Consultancy services
  • Process & mechanical design engineering &contracting
  • Quality control
  • Assurance and inspection
  • Project management
  • Purchasing & procurement
  • Contracting
  • Manufacturing design, engineering & quality control
  • Plant & equipment valuations

Technical services

  • Petroleum products including treatment design & development
  • Energy conservation & management
  • Environment
  • Oil and gas processing
  • Pipelines
  • Metal cutting, forming and casting
  • Mineral oil extraction
  • Gas supply & control
  • Pharmaceutical products
  • Process plant
  • Pressure vessels
  • Food & drink processing machinery
  • Chemical industry machinery
  • Transport
  • Welding


Process industries

  • Process and Mechanical Equipment and Piping Design in the oil and gas, petroleum refining, petrochemical, organic chemicals including ammonia production and storage, pharmaceutical and power generation industries with specific experience of process plant design, procurement, construction and commissioning of refineries, oil /gas processing units, petrochemical plants, cryogenic air separation units, water filtration and deionization, effluent treatment units, FCC and hydro cracking units, sulphur recovery units, LNG/LPG/NGL plants, gas compression and gas/liquid pipelines, gas/liquid storage tank facilities and CHP and CCGT power generation.
  • Extensive experience both as an Owner's Representative and as a Contractor in preparing and executing the EPC basic design, detailed design, procurement and construction and commissioning to international model forms of contract (FIDIC orange book and similar) of oil and gas production, processing facilities and pipelines.
  • Specific experience of new and used process plant valuations and preparation of capital and operating cost estimates (quantum).

Manufacturing Industries

  • Mechanical Design, Engineering, Quality Control and Operational Safety in the manufacturing industries.
  • Specialisation in flexible manufacturing techniques, 'Just-in-Time' work in progress, computer aided design and CNC, tooling and manufacture, Quality Control and Assurance requirements to ISO 9001 and assessment of product design and manufacture in respect to assessment of "fitness for purpose". Also provides plant and machinery valuations.

Expert Witness Experience

  • Significant expert witness experience in UK High Court and the International Court of Arbitration on over 70 cases and giving oral evidence 26 times.

Technical Backup​

If your project is broad in scope, Mr. Lumley has a pool of talented professionals he can tap into and bring on board. As the managing director of Manderstam International Group of consulting engineers, Mr. Lumley has access to significant multidisciplinary engineering support – in process, piping, instrumentation, electrical, structural and metallurgy or welding.

If you require more information or would like to enquire about our consulting engineering or expert witness services, please do not hesitate to get in touch by calling +44 (0) 1273 326 394, emailing or filling out our contact form with your requirements.

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