• Visiting Professor, Royal Institute of Colombo: March 2018 To date
• Senior Professor in Mathematics, University of Kelaniya: February 2009 - February 2018
• Professor in Mathematics, University of Kelaniya: February 2002 - February 2009
• Senior Lecturer, Grade I, University of Kelaniya: April 1991 - February 2002
• Associate Professor (on leave from the University of Kelaniya), Tokuyama University, Japan: August 1990 - April 1993
• Senior Lecturer Grade II, University of Kelaniya: April 1985 - March 1991
• Lecturer Probationary, University of Kelaniya: January 1976 - March 1985
• Assistant Lecturer (Temp), University of Kelaniya:  June 1975 - December 975
• Temporary Tutor, University of Kelaniya: April 1974 - June 1975

• Acting Vice Chancellor: 12 Dec 2012 - 14 Dec 2012
• Acting Vice Chancellor: 08 June 2013 - 11 June 2013
• Dean, Faculty of Science: 02 Jan 2012 - 01 Jan 2014
• Head, Department of Mathematics: Dec 1999 - Dec 2004

• University Plaque for 40 years of meritorious service in the University of Kelaniya, Sri Lanka – 2016
• Gold Medal for 35 years of meritorious service in the University of Kelaniya, Sri Lanka – 2011
• Silver Medal for 30 years of meritorious service in the University of Kelaniya, Sri Lanka – 2006
• Bronze Medal for 25 years of meritorious service in the University of Kelaniya, Sri Lanka – 2001.
• Associate Professor, Department of Economics, Tokuyama University, Tokuyama, Japan. (August 1990 to March 1993)
• Adjunct Professor, University of Maryland, USA, US Marine Corps Air Station, Department of Defence of USA, Iwakuni, Japan, (April 1991 to December 1992)
• Japanese Government Scholarship for postgraduate studies (1979-1985)
• Invitation to attend UNESCO/CIMPA Meeting of Expert Mathematicians, International Centre for Pure and Applied Mathematics, Nice, France, June 19-20, 1987.
• Special recognition by Marcel Dekker Inc. NY, USA for a publication appeared in one of their journals and an invitation to write a monograph in Mathematical Statistics for their “Statistics” book series. This was not materialized due to non-availability of funding in 1985.
• The concept of “Multivariate Isotonic Regression” was first introduced to the field of Statistical Inference in 1983 with two Japanese mathematicians.
• Senate honours for research for publishing in national indexed journal, 2016.

• Associate Editor - Sri Lankan Journal of Applied Statistics, Institute of Applied Statistics, Sri Lanka (2016 - 2017)
• Life Member, Sri Lanka Association for the Advancement of Science (SLAAS)
• Life Member, Sri Lanka Association for Applied Statistics

• Introduction of a new concept “Multivariate Isotonic Regression”.
• Development of an algorithm for computing multivariate isotonic regression.
• Testing homogeneity of mean vectors against synchronized order restrictions.
• Exploring the possibility of generalizing multivariate isotonic regression concept to exponential family of distributions

• Kyushu University, Japan
• Hiroshima University, Japan

• Member, Editorial Board - Journal of Science of the University of Kelaniya Sri Lanka (2011 to 2017)
• Associate Editor – Sri Lanka Journal of Applied Statistics (2016 - 2017)
• Referee – Metric, International Journal of Statistics, Springer-Verlag (2001)
• Member, Referee Board, Section E1, SLAAS Scientific Sessions (2003)
• Referee- Ceylon Journal of Science
• Referee- Sri Lanka Journal of Applied Statistics

Actively involved in the following curriculum development activities:

• Course Unit system developed for the undergraduate degrees and implemented at the Faculty of Science, University of Kelaniya for the first time in the university system in Sri Lanka.
• Revision of the Mathematics curriculum to include new developments of the subjects and to suit the semester system introduced in the Faculty.
• Designed a new unit, Operations Research STCT 3324, prepared lecture notes and conducted lectures.
• Introduction of new units on Mathematical Modelling and Computational Mathematics in 2001 in keeping with the modern trends and to enhance the employability of the graduates.
• Introduction of a new special degree stream “Pure Mathematics and Statistics” in collaboration with the newly established Department of Statistics in 1999.
• Introduction of a new Special Degree in Mathematical Physics in collaboration with the Department of Physics.
• Introduction of Postgraduate Diploma Program in Mathematics, 1999

• Development of the Statistics syllabus of the MSc Programme in Food & Nutrition, 1986.

• Visiting lecturer in Business Statistics- MBA Program, Faculty of Commerce and Management- 2008, 2009
• Visiting lecturer in Statistics- M.Com. Degree Program, Faculty of Commerce and Management- 1997 to 2012
• Visiting lecturer in Mathematics and Statistics- M. S. Sc. Program, Department of Economics, Faculty of Social Sciences – 1998 to 2001
• Visiting lecturer in Statistics- M. Sc. in Food & Nutrition, Department of Microbiology, University of Kelaniya - 1986 to 2008
• Visiting lecturer in Statistics- M. Sc. in Microbiology, Department of Microbiology, University of Kelaniya – 2009
• Visiting lecturer in Statistics- Master Degree Program in Ayurveda, Gampaha Wickramaarachchi Ayurvedha Institute - 2001
• Visiting lecturer in Statistics- M. Sc. in Industrial & Environmental Chemistry, Department of Chemistry, University of Kelaniya - 2004

• Examiner, Postgraduate Diploma in applied Statistics Projects. University of Colombo, 1988
• Examiner, M. Sc. Research projects. University of Peradeniya, 2001 - 2002
• Joint Supervision, Master of Defence Studies, Is our Present Maritime Infrastructure sufficient to meet the Growing Needs? Army Command and Staff College, 2006
• Examiner, M. Phil Thesis, Improved Estimation of Parameters in Probability Distributions with Known Prior Information, University of Peradeniya, 2010
• Joint Supervision: M. Phil. H. E. Hasanthika, Stochasticity in SIRV Models for the Transmission of Epidemic Diseases, University of Kelaniya, 2014,
• Examiner, Ph.D. Thesis, A Ridge Type Estimation and Preliminary Test Estimation in Linear Regression Model, University of Peradeniya, 2016
• Examiner, Ph.D. Thesis, Small Area Estimation in the Presence of Constraints, University of Colombo, 2019

• Research workshop in Mathematical Ecology, International Centre for Theoretical Physics, Italy, June 1986
• Research workshop and Conference on Data Analysis and Software- International Centre for Pure and Applied Mathematics, France, June 1987
• Attended several conferences and annual research meetings in Japan from 1981 to 1985 and from 1990 to 1993.

• Combined Mathematics  for  GCE A/L -  Publication  Department,  Ministry of Education,  Sri Lanka,  DDS Kulatunga,  MAU Mampitiya,  MDD Devedra, VK Senanayake, DK Mallawaarachchi and M. Ranasinghe, 2005
• Statistics - for C. E. A/L Combined Mathematics, Rathna Poth Prakasakayo, DDS Kulatunga, 2002
• Probability - Resource book for G. C. E. A/L Applied Mathematics, National Institute of Education, 1997
• Set Theory –  Resource  book  for G. C. E.  A/L  Mathematics,   National Institute of Education,   Sri Lanka,    MAU Mampitiya,    DDS Kulatunga,   DK Mallawarachchi and NGA Karunathilake, 1997
• Permutation & Combinations, Probability and Statistics for G. C. E. A/L students, Publication Department, Ministry of Education, Sri Lanka, Advisory and Editorial Board SPB Wickramasooriya, DJC Sooriyaarachchi and DDS Kulatunga, 1995
• Advisory and Editorial Board member of the following resource books for C. E. A/L Mathematics, National Institute of Education, Sri Lanka
• Statistics - DDS Kulatunga & DJC Sooriyaarachchi
• Binomial Theorem, Tree Diagrams, Permutations & Combinations – DJC Sooriyaarachchi, DDS Kulatunga and NGJ Dias
• Final Evaluation, Grade 10 and 11 Mathematics, Publication Department Ministry of Education, Sri Lanka

• G.C.E. (A/L) Pure Mathematics: Chief Examiner (1985 - 1997)
• G.C.E. (A/L), Mathematics:   Moderator 2000, 2001
• G.C.E. (A/L) Combined Mathematics, Co-Controlling Chief Examiner, 2010-2011, 2013-2015
• G.C.E. (A/L) Higher Mathematics, Co-Controlling Chief Examiner, 2010-2015
• G.C.E. (A/L) Mathematics, Controlling Chief Examiner, 2010-2015

• Member, Selection Committees for the merit promotions to the posts of Associate Professor/Professor/ Senior Professor of the Faculty of Science – 2012 to 2018.
• Member, Selection Committees for recruitment to the posts of Lecturer (Probationary) / Senior Lecturer and Technical Officers of the Faculty of Science, – 2002 to 2018.
• Member, Selection Committees for the recruitment to the posts of Instructor/Director Physical Education, 1997, 2005 - 2013
• Member, Taskforce to develop the curriculum of the BSc Honours in Data Science and Analytics degree programme – 2017
• Member, Organizing Committee of the Vidya 2017 Science Exhibition held to celebrate the golden jubilee of the Faculty of Science – 2^nd to 9^th October 2017
• Member, Editorial Board - University News Letter – 2007 - 2009

• Member, Sports Advisory Board, 1976 – 1979, 1986 – 2005,
• Chairman, Sports Advisory Board, 1997, 2005 - 2013
• Organised a training programme and short course on Industrial Mathematics sponsored by UNESCO in collaboration with Indian Institute of Technology, Bombay, India in December 2001 during my Headship.
• Resource Person, Staff development programme for probationary lecturers, University of Kelaniya- Research Methodology component- Presentation and Analysis of Data, 1999 to 2012
• Invited lecturer, Workshop on Research Methodology in Social Sciences, Research Center for Social Sciences, 5^th November, 2004
• Member, Editorial Board - Journal of Science of the University of Kelaniya Sri Lanka - 2011 to 2017
• Member, Board of Study in Science - 2009 to 2020
• Member of the Fund Raising Committee for the events of 50^th Anniversary Celebrations of the University of Kelaniya – December 2008
• Member, Advisory / Evaluation Board of the “Kalyana Darshi Educational Exhibition” to celebrate the 50^th Anniversary of the University of Kelaniya – 28 to 30 May 2009
• Dean, Faculty of Science - 2012 to 2014
• President, Alumni Association of the Faculty of Science, 1994 – 1997
• Committee Member, Alumni Association of the Faculty of Science, 1998 – 2016
• Member, University Council - 2012 to 2014
• Member, University Senate - 1999 to 2018
• Member, Board of the Faculty of Graduate Studies, 2001- 2002, 2012 – 2014
• Deputy Chairman of the organizing committee of the 9^th Sri Lanka University Games –SLUG 2007, For the first time of the history of SLUG, a website dedicated to the games, a Mascot and an Official Logo were created. A sports development fund was initiated from the earnings of the event worth more than 2 million rupees.
• Member, Curriculum, Learning, Teaching and Evacuation Committee (CULTEC) - 2002 to 2018
• Member, Board of Study, BNS degree programme, Naval and Maritime Academy, Sri Lanka Navy - 2003 to 2016
• Member, committee appointed by the Vice-Chancellor to accredit the Postgraduate Diploma in Defence Management programme of the Air Force Academy, Sri Lanka Air Force (SLAF) by the UOK - 2006
• Member, Board of Study, Postgraduate Diploma in Defence Management programme, Air Force Academy, Sri Lanka Air Force - 2006 to 2013
• Member, committee appointed by the Vice-Chancellor to Accredit the BSc in Aviation Studies degree programme of the Air Force Academy, Sri Lanka Air Force(SLAF) by the UOK - 2007
• Member, Board of Study, BSc in Aviation Studies degree programme, Air Force Academy, Sri Lanka Air Force - 2007 to 2013
• Member, Organizing Committee of the “SciEx 04” Science Exhibition held for the first time at the Faculty of Science – 8^th to 11^th December 2004
• Head, Department of Mathematics – 1999 - 2004
• Student Councillor, 1976 -1979, 1985 - 1990, 1993 – 1995
• Warden, E. W. Adhikaram Hall, 1998 - 2001

• Chairman, Board of Study in the Physical Sciences, 2001 - 2002
• Member, Board of Study in the Physical Sciences - 1999, 2000, 2002
• Member of the Admissions Committee – 2001, 2002
• Member, Research and Publications Committee - 2012-2014
• Member of the Senate Sub-committee appointed to conduct negotiations for a possible link between the University of Kelaniya and the Surveying and Mapping Institute, Diyatalawa – 1999
• Member of the Senate Sub-committee appointed to revise the existing examination criteria of the Institute of Aesthetic Studies to suit current examinations, 2001
• Member of the Senate Sub-committee appointed to conduct a disciplinary inquiry regarding students clashes and to make recommendations, 2007 March
• Chairman of the committee appointed by the University Council to consider the appeals submitted by four students to relax the conditions of punishments imposed on them for students clashes in the university. 2003, December
• Member of the committee appointed by the Vice Chancellor on 30 January 2004 to make recommendations on providing accommodation at the CWW Kannangara Hostel.
• Member of the committee appointed by the Vice Chancellor on 12 August 2008 to prepare a project proposal on “Ensuring sustainable social and environmental development through higher education” to be submitted to JICA for funding.
• Construction work of a six story building for the BSc Honours in Electronics and Computer Science was started in 2013 during my Deanship. (Cabinet approval received for the building in 2008 and the Budget allocation only in 2013)
• Establishment of the Central Research Laboratory in the Faculty of Science, 2013
• Faculty of Science received an award in 2013 for being the recipient of highest number of competitive grants under QIG schemes of HETC projects among all the faculties of national Universities in Sri Lanka
• Establishment of the Faculty Research Centre in the Faculty of Science, 2013
• Facelift of the Faculty main building and the expansion of the capacity of the Faculty Boardroom were completed in 2013
• Initiated the Bachelor of Arts Degree in Computer Studies (Special) in 2013.
• Joint Secretary, University Teachers Association, 1989, 1999
• Committee Member, University Teachers Association, 2006, 2011
• President, Senior Common Room - 1998
• Senior Treasurer, Science Student’s Union , 2002 - 2004

• Referee to evaluate publications of academic staff seeking merit promotions to the grades of Associate Professor/ Professor of the University of Colombo, University of Peradeniya University of Ruhuna, University of Jaffna, University of Sri Jayawardanapura, University of Moratuwa and Open University of Sri Lanka.
• Member of the selection committees for the merit promotions to the posts of Associate Professor/Professor of the University of Colombo, University of Peradeniya, University of Jaffna, Eastern University, Open University of Sri Lanka, University of Sri Jayawardanepura.

• Member, Selection Committees for recruitment to the posts of Lecturer (Probationary) / Senior Lecturer of Wayamba University of Sri Lanka, – 2003 to 2007.

• Member of the committee appointed by the University Council of the Wayamba University of Sri Lanka to consider the appeals submitted by seven students against the disciplinary action taken against them by the Board of Discipline of the university, 2007, March

• Resource Person, Staff development programme for probationary lecturers, University of Visual and Performing Arts - Research Methodology Component- Presentation and Analysis of Data, 2012
• Visiting Lecturer, Army Command and Staff College, Sapugaskanda - Research Methodology Component- Presentation and Analysis of Data, 2000 to 2012
• Visiting Lecturer, Sri Lanka Institute of Development Administration (SLIDA), 2004
• Member, National Committee on Science, Technology and Mathematics Education, National Science Foundation (NSF), Sri Lanka, July 2009-2012
• Chairman of the Technical Evaluation Committee for the procurement of mathematical equipment under Second General Education Project, IDA/World Bank, Ministry of Education and Higher Education, 2002

• Member, Committee for preparing the Bench Mark Statement of Mathematics and Statistics for Sri Lankan Universities, CVCD & UGC
• Subject Reviewer in Mathematics, Quality Assurance Unit, UGC, 2008, 2009
• Member, Committee for preparing prototype questions in Combined Mathematics, Higher Mathematics and Mathematics, Department of Education, 2009-2010
• Resource Person, Workshop on writing teachers’ guides and in-service workshops for teachers on new GCE(A/L) Mathematics syllabus, National Institute of Education, 1996
• Resource Person, Seminar for provincial resource teams on new GCE(A/L) Mathematics syllabus, National Institute of Education, 1996
• Resource Person, Workshop for the preparation of summative evaluation material in GCE(A/L) Pure and Applied Mathematics, National Institute of Education, 1996
• Resource Person, Teacher training programmes in GCE (A/L) Mathematics, Applied Mathematics and Pure Mathematics, National Institute of Education, June, 1996, February 1997, May 1997,
• Evaluation of Scientific Abstracts
  • Annual Sessions of the Sri Lanka Association for the Advancement of Science
  • Annual Scientific Sessions of the University of Ruhuna

• Moderator / External Examiner
  • University of Ruhuna, 1985 - 2002
  • University of Wayamba, 1994- 2002
  • Eastern University, 2000 - 2004
  • Rajarata University, 1999- 2002
• Visiting Lecturer
  • University of Colombo, Department of Statistics, 2008
  • Eastern University, 1994
  • Teaching unit for the displaced students from the Eastern University, 1987

• Thesis evaluator, SLAAS Physical Science Award, 2009
• Invited Speaker, “A review of some developments of multivariate isotonic regression”, International Statistics Conference, Applied Statistics Association of Sri Lanka, 2009 January
• Member of the committee appointed to supervise the calculation of Z-Score and Island and District Ranks of GCE(A/L) examination, Commissioner General of Examinations, 2016 - 2020.
• Member of the committee appointed to Study the Issues of Releasing Z-Scores at the GCE (A/L) Examination, 2011, University Grants Commission, 2011
• Member of the Presidential Committee to Examine the Calculation of Z- Scores, Presidential Secretariat, 2012
• Member, Advisory Board, Sinhala Encyclopaedia, Department of Cultural Affairs, Since 2018
• Member, Governing Council of the Sri Lanka Institute of Local Governance, Ministry of Provincial Councils and Local Government Affairs, since October 2020

• Preparation and presentation of educational television programs on Probability, Permutations & Combinations, Solid Geometry and Mathematical Induction for Rupavahini, 1986
• Organised and conducted live television programmes on Independent Television Network in Sri Lanka for G.C.E. (A/L) Mathematics and Pure/Applied Mathematics students in 1997, 2006, 2007, 2008 and on Rupavahini Television for G.C.E. (A/L) Combined Mathematics students in 2000,2001
• Co-ordinator of the organising committee of the counselling sessions for all island A/L master teachers in Pure and Applied Mathematics in collaboration with NIE, Maharagama, Faculty of Science, University of Kelaniya, November 1996
• Co-ordinator of the organising committee of the counselling sessions for all island A/L teachers in Mathematics, Physics, Chemistry, Botany and Zoology, Alumni Association of the Faculty of Science, University of Kelaniya, November 1997
• Organised five workshops jointly with the Alumni Association of the Science Faculty of the University of Kelaniya in 1998 and 1999 for GCE(A/L) Physics teachers of Galle, Matara, Hambantota, Monaragala, Nuwara Eliya, Matale, Kegalle, Puttalam, Anuradhapura, Polonnaruwa, Kurunegala, Ampara, Kegalle and Ratnapura Districts at the University of Kelaniya.

• Junior Treasurer, Science Students Union  - 1972
• Committee Member, Students Council, University of Kelaniya - 1972
• Junior Treasurer, Sports Council - 1973
• University Colours in Soccer - 1972
• University Colours in Cricket, Soccer and Athletics  - 1973
• Best Fielder, Cricket - 1973
• Best Soccer Player - 1973
• Captain, Soccer team - 1973
• Best Fielder, Annual Vidyalankara-Vidyodya cricket match - 1973
• Best Batsman-Runner-up, Inter University Staff cricket tournament - 1988
• Captain, University of Kelaniya Staff Cricket team: 1994 -1996, 2001
• President- Foreign Students Association, Kyushu University, Japan - 1983
• Committee Member, State Services Cricket Association, Sri Lanka - 2001
• Member, University of Kelaniya Staff Cricket team that won State Services D Division Runner-Up Championship Trophy - 1999

1. Multivariate generalization of isotonic regression- I, II, III, IV, Proceedings of Annual Conference of Mathematical Association of Japan, Tohoku University, Japan, 1982, April. S. Sasabuchi, M. Inutsuka and DDS Kulatunga
2. A multivariate version of isotonic regression, BIOMETRIKA (1983) 70, 465-72 S Sasabuchi, M Inutsuka and DDS Kulatunga
3. Convolutions of the probabilities P(l,k) used in order restricted inference, MEMOIRS OF THE FACULTY OF SCIENCE, KYUSHU UNIVERSITY, (1984) 38, 9-15 DDS Kulatunga
4. Moments of the test statistic E- Bar-Squared used in order restricted inference and an approximation of its null distribution, Proceedings of Annual Conference of Mathematical Association of Japan, Osaka University, Japan, 1984, April.  S. Sasabuchi and DDS Kulatunga
5. Tests of simultaneous homogeneity against ordered alternatives in Analysis of Variance, Proceedings of Annual Conference of Mathematical association of Japan, Osaka University, Japan, 1984, April.  DDS Kulatunga and S. Sasabuchi
6. A test of homogeneity of mean vectors against multivariate isotonic alternatives, MEMOIRS OF THE FACULTY OF SCIENCE, KYUSHU UNIVERSITY, (1984) 38, 151-61, DDS Kulatunga and S Sasabuchi
7. An approximate formula for the convolutions of the probabilities P(l,k), MEMOIRS OF THE FACULTY OF SCIENCE, KYUSHU UNIVERSITY (1984) 38, 177-82,  DDS Kulatunga
8. A test of simultaneous homogeneity against ordered alternatives in multifactorial design, COMMUNICATIONS IN STATISTICS - THEORY AND METHODS (1984) 13, 3173-83, DDS Kulatunga and S Sasabuchi
9. Some Approximations for the null distribution of the E-bar-Square Statistic used in order restricted inference, Proceedings of Annual Autumn Meeting of Mathematical Association of Japan, Tokyo University, Japan, 1984, October, S. Sasabuchi and DDS Kulatunga
10. Testing homogeneity of k Normal means against ordered alternatives in r groups having uncommon and unknown variances, Proceedings of Annual Autumn Meeting of Mathematical Association of Japan, Tokyo University, Japan, 1984 October, DDS Kulatunga and S. Sasabuchi
11. On the distribution of E-bar-Square and its product used in order restricted test, Proceedings of the Symposium on Inference in Parametric Models, Institute of Statistical Mathematics, Statistical Society of Japan, Tokyo, 1984, December, S. Sasabuchi and DDS Kulatunga
12. Testing homogeneity of t normal means against ordered alternatives in 2 groups having uncommon and unknown variances, COMMUNICATIONS IN STATISTICS - THEORY AND METHODS (1985) 14, 701-11, DDS Kulatunga
13. Some approximations for the null distribution of the E-Bar-Squared statistic used in order restricted inference, BIOMETRIKA (1985) 72, 476-80, S Sasabuchi and DDS Kulatunga
14. On an algorithm for computing Multivariate Isotonic Regression, Proceedings of Annual Autumn Meeting of the Mathematical Association of Japan, Hokkaido University, Japan, 1991, October., S. Sasabuchi, M. Inutsuka and DDS Kulatunga
15. Comparison of powers of some tests for testing homogeneity under order restrictions in multivariate normal means, Proceedings of Annual Conference of Mathematical Association of Japan, Chuo University, Tokyo, Japan, 1992, March, DDS Kulatunga and S. Sasabuchi
16. An algorithm for computing multivariate S Sasabuchi, M Inutsuka isotonic regression, HIROSHIMA MATHEMATICAL JOURNAL (1992) 22, 551-560, S Sasabuchi, M Inutsuka and DDS Kulatunga
17. Comparison of some tests of the homogeneity of Binomial probabilities under an order restriction, Proceedings of Annual Conference of Mathematical Association of Japan, Tohoku University, Japan.  1995, September, DDS Kulatunga, M. Asai and S. Sasabuchi
18. A simulation study of several tests of the equality of binomial probabilities against ordered alternatives, JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION (1996) 56, 53-75,  DDS Kulatunga, M,  Asai and S Sasabuchi
19. Comparison of powers of some tests for testing homogeneity under order restrictions in multivariate normal means, SPECIAL VOLUME ON MULTIVARIATE STATISTICAL ANALYSIS, AMERICAN JOURNAL OF MATHEMATICAL AND MANAGEMENT SCIENCES (1998) 18, 131-158 S Sasabuchi, DDS Kulatunga and H Saito
20. Approximations for the null distribution of a statistic caused by random combinations, SRI LANKAN JOURNAL OF APPLIED STATISTICS (2000) 1, 1-11, DDS Kulatunga, A Kudo and S Azuma
21. Convergence of multivariate isotonic regression, Proceedings of Annual Research   Symposium, University of Kelaniya, (2006), WTPS Fernando and DDS Kulatunga
22. Tests against tree order restriction in Poisson intensities, Proceedings of Annual Research   Symposium, University of Kelaniya, (2006), WTPS Fernando and DDS Kulatunga
23. On the computation and some applications of multivariate isotonic regression, COMPUTATIONAL STATISTICS AND DATA ANALYSIS (2007) 52, 702-712 WTPS Fernando and DDS Kulatunga, available online at www.sciencedirect.com
24. Tables for testing simultaneous homogeneity against ordered alternatives in 3-way layout and Latin Square Design, Proceedings of Annual Research   Symposium, University of Kelaniya, (2008), N. Prematathna and DDS Kulatunga
25. A review on some developments of multivariate isotonic regression, SRI LANKAN JOURNAL OF APPLIED STATISTICS (2009) 9, 17-37, DDS Kulatunga
26. An urban water consumption model for Gampaha district, Sri Lanka, Proceedings of Annual Research   Symposium, University of Kelaniya, (2012), A. Gunawardana and DDS Kulatunga
27. Analysis of fatalities in road accidents considering Peliyagoda police area in Gampaha district as a case study, Proceedings of Annual Research   Symposium, University of Kelaniya, (2012),  DMPV Dissanayaka and DDS Kulatunga
28. SIRV models for the transmission of epidemic diseases, Proceedings of Annual Research   Symposium, University of Kelaniya, (2013), N.H.E. Hasanthika, D.D.S. Kulatunga, D.K. MallawaArachchi
29. Stochasticity in SIRV models for the transmission of epidemic diseases, Proceedings of International Conference on Mathematical Modelling, University of Colombo, (2014), N.H.E. Hasanthika, D.D.S. Kulatunga, D.K. MallawaArachchi
30. On the tests for homogeneity of mean vectors under synchronized order restrictions, JOURNAL OF THE NATIONAL SCIENCE FOUNDATION OF SRI LANKA (2016) 44(1), 53 - 60, S Sasabuchi and DDS Kulatunga
31. Economic determinants of suicides in Sri Lanka over the period 1975-2015, Proceedings of Annual Research Symposium, University of Kelaniya, (2017), RPDCS Devindi and DDS Kulatunga
32. Trends and eeconomic determinants of suicides in Sri Lanka, Proceedings of Annual Research Symposium, University of Ruhuna, (2018), RPDCS Devindi and DDS Kulatunga
33. Adaptive green time allocation method for traffic congestion based on cell Transmission model and genetic algorithm, INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH AND KNOWLEDGE, (2019), 4(5), 56- 69, H. A. D. Priyasad and DDS Kulatunga