From 2003 to 2007, Des worked as a Lecturer at Maynooth University. From 2007 to 2008, he worked as a Senior Usability Analyst at iQ Content. From 2009 to 2010, he was a Lecturer in User Experience Design at National College of Ireland. From 2008 to 2011, Des worked as a User Experience Lead at Contrast, a small web application development agency.
In 2003 Des received a Bachelor of Science in Computer Science and Software Engineering from Maynooth University. He also pursued a Doctor of Philosophy in Computer Science and Software Engineering.