1. Life Member, Assam Academy of Mathematics (AAM).
2. Life Member, Society for Special Functions and Applications (SSFA).
3. Life Member, Indian Mathematical Society (IMS).
4. Life Member, Indian Society for Theoretical and Applied Mechanics (ISTAM).
4. Ordinary Member, American Mathematical Society (AMS).
5. Ordinary Member, Society for Industrial and Applied Mathematics (SIAM).
5. Trustee, Mathematics Education Trust, Assam (META).