Jon is a software consultant specialising in practice, process, test driven development and complex-adaptive systems thinking. He's 32 years old (hex) and has loved software since he was 10 (decimal). He built cyber- dojo.org to promote deliberate practice for software developers. Jon has worked with Accenture, Aviva, Cisco, Ericsson, Friends Provident, HP, Microsoft, Opera, Ordnance Survey, RBS, Reuters, Renault F1, Schlumberger, Tandberg and many many more. If you don’t like his work, he won’t invoice you. He's the co-author (with Olve Maudal) of the Deep C/C++ slide deck (over 600,000 views) and has had some C# books published. He's also the ex-ECMA Task Group 2 C# convenor and ex- ACCU conference chairman. Jon is married to the beautiful Natalie, and proud father of Ellie, Penny and Patrick. He loves coarse fishing and salmon fishing and lives in Somerset, England.