I have retired. The old domain jdl.co.uk now belongs to someone else .
My book site did not disappear however, so if you found yourself here while looking for book support, you’re at the correct site.
JDL was a trading name I used when I provided IT services.
I specialized in training and consulting in object-oriented analysis, design and programming for over 25 years. Prior to that I was at Woolwich Polytechnic (now Greewich University).
I worked on all manner of systems. Much of my work was with the high-energy physics, astronomy and Grid computing communities. Starting in 1993 I was involved with several high-energy physics organizations – principally CERN (Geneva/Meyrin), Rutherford Appleton Laboratory (Didcot) and DESY (Hamburg). I also worked with NIKHEF and INFN.
I also worked with people from space, astronomy and GRID computing. As well as at Rutherford Appleton Laboratory, I delivered courses at The Royal Observatory (Edinburgh) and Isaac Newton Group (La Palma).
As JDL I worked primarily in analysis and design. In the early days the the flavour-of-the month was structured analysis and design. Quite soon however, research and experience showed that object-oriented analysis and design had more to offer.
At Thames Polytechnic I had begun in the Systems Analysis division, but I’ve always loved coding and I switched to working half and half for the Systems Analysis division and the Programming division. The same thing happened in my commercial career with JDL. I added object-oriented programming to my offerings, teaching Smalltalk, C++ and Java.
One of the things you need to avoid when you are self-employed is having all your eggs in one basket. I had the opportunity to help create a consultancy outside of the science arena and co-founded Matrice (formerly Lattice Limited) delivering consulting and training to businesses.