Jonathan has been a member of academic staff in the School of Electronic Engineering and Computer Science at Queen Mary, University of London since 1994, and a full professor since 2001. During that time, his research has focused on developing effective analytical techniques for modelling the complex behaviours of shared infrastructure and their impact on end-to-end application performance. In 1998 he was awarded a Royal Academy of Engineering Industrial Secondment. Jonathan has established a number of industry relationships with organizations such as Cisco, Qinetiq, Alcatel-Lucent, BT and C&W. He has written two books on the subject of performance evaluation and quality of service, and has five granted patents and over 100 papers in the field.