[6] After completing 10 years as the director of IICB, he returned to Bose Institute in 2014 as a senior professor and dean of studies.

While at IICB, he has served the nation in several different high-level capacities such as the founder-director-in-charge of the National Institute of Pharmaceutical Education and Research, Kolkata (NIPER) (2007–14), the cluster director of 11 Biological institutes of the Council of Scientific and Industrial Research (CSIR) (2009–14), member of the governing body of the CSIR and as a visiting professor at Osaka University (2012).

[7] He is also reported to have performed the complete assignment of a nucleic acid imino proton spectra using Nuclear Overhauser effect, regio-specific isotope labeling of sugars in nucleic acids and working along with Ad Bax and R. H. Griffey, developed an indirect 2D-NMR detection method, all reported to be for the first time.

[7] Later focusing his attention on bacteriophage lambda, he studied the gene expression of the bacterial virus using its operator-repressor system.

[10] Through his collaborative work with Sankar Adhya in 1998, he elucidated the role of differential contact in the transcription regulation mechanism and demonstrated the theory in many genetic regulatory circuits.

[7] He is a Fellow of the Royal Society of Chemistry, UK and has been elected a member of The World Academy of Sciences (FTWAS).