· Visiting Professor, Department of Computer Science, University of Oxford2022–2022
· Visiting Professor, University of Cambridge Department of Computer Science and Technology2021–2022
· Head Of School Of Computer Science Information Technology, University College Cork2018–2021
· Deputy Director Principal Investigator, CONNECT Research Centre (Current)2015–
· Head Of Computer Science Department, University College Cork2015–2018
· Visiting Professor, UNSW Computer Science and Engineering (University of New South Wales)2005–2006
· Head Of Computer Science Department, University College Cork2000–2005
· Founder Director, Mobile & Internet Systems Lab. (Current)1999–
· Full Professor, University College Cork (Current)1999–
· Researcher, AT&T1993–1999
· IT Consultant, Hoskyns Group plc1990–1993
· Tutor, Christ's College Cambridge1989–1992
· Ph.D., Computer Science, University of Cambridge1988–1993
· Computer Science, University College Cork1983–1988