In 1954, he returned to India, accepting
Homi J. Bhabha's invitation to join the project team set up by the
Tata Institute of Fundamental Research, (TIFR) Mumbai for the development of the first indigenous computer. His next assignment at TIFR was the establishment of a software development centre and that is reported to have paved way for the founding of the
National Center for Software Development and Computing Techniques (NCSDCT) under TIFR. In August 1963, the
Government of India set up an interdepartmental Electronics Committee under the chairmanship of
Vikram Sarabhai for finding ways for self-sufficiency in the electronics industry sector and Narasimhan was made the chairman of one of the sub committees, entrusted with the responsibility to look into the possibilities of finding ways to reduce dependence on
IBM and
International Computers Limited. and Narasimhan was entrusted with the responsibility which resulted in the formation of
Computer Maintenance Corporation, later day
CMC Limited as a fully owned government company in 1977 with Narasimhan as its founder chairman. He was also connected with TIFR at their
National Centre for Software Development Computing Techniques from 1975 to 1985. Narasimhan was associated with several agencies and organizations for his research; the Industrial Design Centre at
Indian Institute of Technology Bombay, the Speech Pathology Unit of
Topiwala National Medical College and Nair Hospital, the
All India Institute of Speech and Hearing, the
Central Institute of Indian Languages, the
Indira Gandhi National Centre for the Arts, and the Centre for Applied Cognitive Science at the
Ontario Institute for Studies in Education, Toronto were some of them. He sat on the council of the
International Federation for Information Processing as the representative of India during 1975-86 and was a member of the Scientific Advisory Council of the Indo-French Centre for the Promotion of Advanced Research from 1988 to 1990. He retired from TIFR service in 1990 as a
professor of eminence but retained his association with CMC past his retirement in the capacity as an advisor even after the company was bought by
Tata Consultancy Services in 2001. He died on 3 September 2007, at the age of 81, in
Bengaluru in
Karnataka. ==Legacy==