The following are some highlights of the past 20 years:

• Inventing and patenting a PIN-number based telephone access system (1983) - the precursor to all pre-paid phone cards
  
  
• Inventing, patenting and producing the first electronic printer-sharing switch in the world (1984) - now widely imitated, of course.
  
  
• Running two multi-national projects for the EU (1992-5), with responsibility for a budget of €1.8M
  
  
• Planning and building the business case for the subsea oil platform-to-shore fibre-optic network for the North Sea (1998-9), for a consortium of oil companies
  
  

However, it's essential to keep as far as possible at the cutting edge. Click here for current technical skills.