Dr Ragel was appointed a Senior Lecturer in Computer Engineering at the University of Peradeniya in December 2007 and a Professor since October 2017. He has been a Professional Member of the IEEE and IEEE Computer Society since 2005 and a Senior Member since 2014. He is also a Professional Member of the Association of Computing Machinery (ACM).  Prof Ragel has co-authored almost 200 peer-reviewed articles in topics including System on Chip, Internet of Things, Bioinformatics, Wearable Computing, and Digitisation of Local Language Text. He has won several best paper awards in conference papers, the most prolific Sri Lankan author award from Elsevier Research in 2017 and the Presidential award for scientific publication in Sri Lanka in 2018. He is also named the Top Scientist in Computer Science in Sri Lanka by AD Scientific Index 2021 and 2022. With his present h-index of 23 (i10-index of 42), he is also recognised as a Tier 4* awardee by the University of Peradeniya for Research Excellence under the Transparent Research Performance Scheme introduced by the University Grants Commission (UGC) Sri Lanka. He was a visiting research scholar at the UNSW – Sydney, QUT – Brisbane, UIUC – Illinois and ANU – Canberra.