N.S. Rathnayaka, “A Survey of Numerical Solutions of Linear Equations Systems”, Unpublished Thesis, Department of Mechanical Engineering, University of Ruhuna, Sri Lanka, 2003.
Workshop on Financial Risk Management in Research and development Center for mathematical Modeling, Department of mathematics, University of Colombo, Sri Lanka, 11th January 2014.
Participation/Present in DAAD partnership workshop organized by Department of Natural Sciences, School of Science, Kathmandu University, on “ Numerical Methods for Ordinary and Partial Differential Equations” held during September 2 – 13, 2013at Kathmandu University, Dhulikhel, Nepal.
Workshop on ‘’Open Source in Education” Organized by Department of Computer Science, Faculty of Science, University of Ruhuna on 11th Oct. 2006, at the University of Ruhuna.
Ruhuna International School Computational and Mathematical Physics (RISCMAP) in Sri Lanka from 20 December-25 December, 2004.
Visiting Lecturer, Department of Tech./B.Tech for MPZ 3230/ MPZ 5230 in the Open University of Sri Lanka-(July 2007 to July 2008).
UNDERGRADUATE TEACHING EXPERIENCES
Senior Lecture Gr II, Faculty of Engineering, General Sir John Kotelawala, Defence University, Sri Lanka (2016 onward)
Lecturer (probationary), Faculty of Engineering, General Sir John Kotelawala, Defence University, Sri Lanka (2009 – 2016).
Assistant Lecturer , Department of Mathematics, University of Ruhuna, Sri Lanka (Nov 2004-Nov 2007)
Tutor in Mathematics, Department of Mathematics, University of Ruhuna, Sri Lanka (Nov.2003-Nov 2004).
Head of the Department, Department of Mathematics, General Sir John Kotelawala Defence University (from September 2016 to September 2021)
Chairperson, Engineering Faculty, IT Cell (EF), KDU (from February 2018 to February 2019)
Coordinator of Department of Mathematics, General Sir John Kotelawala Defence University (from August 2016 to February 2017)