Primary Skills

Materials & Design

  • Materials selection

  • Product design and evaluation


  • Injection moulding

  • Thermoforming



  • Expert witness


  • Packaging

Other Skills

  • Project management

  • Troubleshooting

Other Skills

Materials & Design

  • Composites

  • Textiles


  • Blow moulding

  • Finishing and decorating

  • Rotomoulding

  • Welding and fastening


  • Consumer products

  • Housewares

  • Leisure

  • Office products

What we do

Bernard Sinclair is a Mechanical Engineer who has spent most of his career working within or for manufacturing industry. Practising since 1974, he has spent time designing and developing products for Hoover and Wilkinson Sword amongst others before establishing Product Engineering Associates. As the longest serving member of Plastics Consultancy Network, Bernard Sinclair served on the executive committee for the period 1995-2000. He has also acted as a Neighbourhood Engineer, taking Mechanical Engineering expertise into secondary schools, assisting students and staff in matters relating to design technology as well as advising on engineering, manufacture and the selection of plastics. He also undertakes expert witness work relating to design, manufacture and intellectual property.

PEA was formed by Bernard Sinclair in 1987. It specialises primarily in the design, innovation and development of consumer products.

Work undertaken is technically led and includes, design and engineering on both new and existing products. This includes concept design, product design & development work and trouble shooting. Additional work provides clients with advice on design, materials and manufacture of proposed products, providing clients with technical specifications, provisional designs, prototypes, models, manufacturing cost estimates and estimates for tooling. Projects are generally managed to the point of final approval of sampled components.

Bernard Sinclair has undertaken a number of expert witness and legal assignments. These mainly relate to disputes in connection with product design, intellectual properly or mechanical design (Haberman and V & A Marketing vs Jackel International: Non-spill toddler cup Anywayup Cup, Blue Gentian vs Tristar Products: Expandable Garden Hose – X Hose).

Clients for projects of this kind include:

Freshfields, Dibb Lupton Alsop (DLA), Millbank, Tweed, Hadley and McCloy, Bates, Wells and Braithwaite, BNFL and Birmingham Alliance/Hammerson UK Properties, DWF LLP, Bristows and Freshfields.

Our experience

Manufacturing and marketing companies:

Wilkinson Sword, Canon Audio, Plastics Development Centre, Compactors Worldwide, Binney and Smith (Crayola), Lord Precision Industries, Samas Roneo, Premiere Bathrooms, Pitrok, Formula One Administration, William Levene, PowerFloss, Freshlink Dispensers.

Design Consultancies:

Conran Design Group, Pentagram Design, Queensberry Hunt Levien, Hop Design, Rowe Associates, Goodwin Emck Product Design, Product First.

Work completed on products for:

Quad Electroacoustics, Psion, Tomy, Atco-Qualcast, Carter Parratt, Hoyles, Corning, Maws, Samsung, Household Articles, Dualit*.

* Not clients of Product Engineering Associates.

Contact Details