He then joined Bhabha Atomic Research Centre (BARC) in Bombay and continued there till 1975.

From 1969 to 1973 he worked as the Assistant Director of the State Institute of Languages in Kerala, on a deputation from BARC.

Under his leadership, the KSSP grew into a massive people’s movement and influenced science communicators all over the country.

[3][4] After KSSP became a success in Kerala, M. P. Parameswaran took steps to enlarge the canvas at the national level.

This led to the formation of Bharat Gyan Vigyan Samiti (BGVS), which was responsible for the massive literacy campaign initiated in India.

[6][7] In 2007, he acted in a Malayalam movie named AKG about the Communist leader A K Gopalan in which M. P. Parameswaran donned the role of Kerala's first Chief Minister E. M. S. Namboodiripad.