1. Taxonomy
2. Bryophytes
3. Biochemistry 
4. Microbiology
5. Biostatistics

1. International Kohinoor Award by Economic Growth Foundation Uzbekistan

2. Best Educationist Award-Achievers Publishing House, New Delhi

3. Best Teacher Award-Adarsh Vidya Saraswati Rashtriya Puraskar by Global Management Council, Ahmedabad

4. Post Doctoral Fellow, Plant Biochemistry and Molecular Biology Unit, University College, Thiruvananthapuram.

5. Young Scientist Award – 2000 from Department of Science, Technology and Environment, Govt. of Kerala.

6. Coauthor of the best paper award, 2002 from Department of Science, Technology and Environment, Govt. of Kerala.

7. Principal Investigator of a project entitled “Inhibitory and Suppression factors affecting Root (wilt) diseased coconut palms” funded by Department of Science, Technology and Environment, Govt. of Kerala.

8. Principal Investigator of a project entitled “Campus Biodiversity Register” funded by Kerala Biodiversity Board, Govt. of Kerala.

9. Resource person for Refresher courses in Botany for College teachers.

10. Founder Director, Louis Pasteur Centre for Biotechnology, Thiruvananthapuram.

11. Founder Member, ECORUN, Kerala

12. Participated in Orientation and Refresher Programmes organized by ASC, Kariavattom and HRDC 

13. Senior Research fellow, University of Kerala.

14. Member, Indian Association of Angiosperm Taxonomists

15. Member, Board of Examiners, M. G University (UG & PG).

16. Member, Expert Committee, M. G University

17. Member, Vigilance Squad, M G University

NATIONAL

1. Mathews T Thelly participated in the national workshop on ”Intellectual Property Rights” held on 12^th August 2014 at St. Thomas College, Pala.

2. Mathews T Thelly participated and delivered a lecture in the UGC Sponsored National Seminar on ”Utilisation, Management and Conservation of Medicinal plants” held on 10^th &11^th  December, 2014 at Bishop Kurialacherry college, Amalagiri.

3. Mathews T Thelly participated in the national workshop on” Genomics, Proteomics and Bioinformatics: Fundamentals to Advanced” held on 18^{th, 19th} & 20^th December 2015 at St. Thomas College, Kozhencherry.

4. Mathews T Thelly delivered a talk on the Topic-‘Climate change and biodiversity’ at a National seminar  “Western Ghats past, present and future scenario” at Mar Thoma College Thiruvalla.