(1) I am a member of the following ATM Programme of NCM for a period of 3 years (July 2021 to July 2024)

1. Instructional School for Teachers .

2. Teachers Enrichment Workshops.

(2) Reviewer for:

1. Journal of Number Theory (Elsevier).

2. Advances in Mathematics (Elsevier).

3. Pacific Journal of Mathematics .

4. Proceedings of the National Academy of Sciences, USA.

5. Proceedings of the London Mathematical Society.

6. Proceedings of the American Mathematical Society.

7. Finite Fields and Their Applications (Elsevier).

8. European Journal of Combinatorics (Elsevier).

9. Journal of Combinatorial Theory, Series A (Elsevier).

10. Electronic Journal of Combinatorics.

11. International Journal of Number Theory (World Scientific).

12. Journal of Mathematical Analysis and Applications (Elsevier).

13. Journal fur die reine und angewandte Mathematik (Crelle's Journal)

14. Research in Number Theory (Springer).

15. Results in Mathematics (Springer).

16. Discussiones Mathematicae Graph Theory.

17. The Ramanujan Journal (Springer).

18. Science China Mathematics (Springer).

19. Research in Mathematical Sciences (Springer).

20. Bulletin of the Australian Math. Soc. (Cambridge).

21. Proceedings of the Edinburg Mathematical Society (Cambridge).

22. Rocky Mountain Journal of Mathematics.

23. Open Mathematics (De Gruyter).

24. Journal of Analysis (Springer).

25. Thai Journal of Mathematics

26. Journal of Difference Equations and Applications

27. Boletin da Sociedade Paranaense de Mathematica

28. SIGMA: Symmetry, Integrability and Geometry: Methods and Applications.

29. Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas (Springer)

30. Journal of Integer Sequences.

31. Involve .

32. INTEGERS: Electronic J. Combinatorial Number Theory.

33. Proceedings - Mathematical Sciences, Indian Academy of Sciences.

34. Journal of Ramanujan Mathematical Society.

35. Springer Plus (Springer).

36. Proceedings of Jangjeon Mathematical Society, South Korea.

37. Indian Journal of Pure and Applied Mathematics.

38. Journal of the Indian Academy of Mathematics.

39. Journal of the Indian Mathematical Society.

40. Palestein Journal of Mathematics.

41. Far East Journal of Mathematics .

42. Proceedings of the National Academy of Sciences, India Section A: Physical Sciences (Springer).

43. Journal of Assam Academy of Mathematics .

44. Mathematical Reviews (MR).

45. Zentralblatt MATH.

(3) Ph.D. thesis examiner: IISc Bangalore, IISER Berhampur, IIT Gandhinagar, IIT Patna, IIT Roorkee, BITS Pilani, Manipur University, Tezpur University, North Eastern Hill University (NEHU), Mysore University, Sambalpur University, Central University of Jharkhand, Rajiv Gandhi University, Itanagar, Thapar Institute of Engineering and Technology

(4) Organizing Secretary of "38th Annual Conference of Ramanujan Mathematical Society", December 22-24, 2023

(5) Organized the workshop on Jacobi Forms at IIT Guwahati, December 12- December 24, 2022.

(6) Organized the Annual Foundation School III (AFS-III) at IIT Guwahati, June 20- July 16, 2022.

(7) Organized the online Workshop on Modular Forms, December 14-19, 2020.

(8) Organized the Advanced Instructional School (AIS) on Modular Forms, May 13- June 1, 2019, Venue: IIT Guwahati.

(9) Chaired a session at the Number Theory workshop, NISER Bhubaneswar, December 3-6, 2018.

(10) Chaired a session at the International Conference on Class Groups of Number Fields and Related Topics-2018, HRI, October 8-11, 2018.

(11) Member Secretary, Departmental Postgraduate Program Committee, Department of Mathematics, IIT Guwahati, January 2020- present.

(12) Member, Departmental Postgraduate Program Committee, Department of Mathematics, IIT Guwahati, January 2018- present.

(13) Faculty Advisor of MSc 2017--2019 Batch, Departmental of Mathematics, IIT Guwahati.

(14) Member Secretary, Departmental Faculty Board, Departmental of Mathematics, IIT Delhi, 2014--2015 (2 years).

(15) Organized the Advanced Instructional School (AIS) on Algebraic Number Theory, May 14- June 2, 2018, Venue: IIT Guwahati.

(16) Organized the Annual Foundation School-I, December 1-28, 2016, Venue: IIT Guwahati.

(17) Organized the Winter School on Galois Theory, December 12-15, 2012 (NBHM sponsored), Venue: Tezpur University.

(18) Organized the Winter School and Conference on Algebra and Number Theory, December 23-29, 2011 (NBHM and DST sponsored), Venue: Tezpur University.

(19) Organized the Workshop on Algebra and Number Theory, December 22-26, 2010 (NBHM and DST sponsored), Venue: Tezpur University.