Kerala State Electronics Development Corporation Limited (KELTRON) was formed in 1973 with K. P. P. Nambiar as its first Chairman and Managing Director. He remained in that position till 1983 when he was made the Executive Chairman till his retirement in 1985. In 1985, Nambiar was appointed as the Chairman and Managing Director of Indian Telephone Industries Limited, the largest Public Sector Company in Telecommunication in India and retired from Government service in 1989.
Kerala Government, in 1989, appointed him as the Honorary Special Advisor and that was when he drew up the blueprint for Techno Park in Thiruvananthapuram. The Park came into existence on 31 March 1991.While acting as the Special Advisor, Nambiar set up a private company in Bangalore, Namtech Electronic Devices Limited, for the manufacture of Fail Safe Gas Discharge Tubes used as Surge Arresters in Electronic and Telecommunication equipment. Namtech is also involved in the manufacture of quartz crystals, crystal oscillators, light emitting diodes (LEDs) and LED Displays.
In February 1995, Nambiar launched an INR 1500 crore project to generate 513 MW of Power under the name of Kannur Power Projects (P) Limited in his native Panchayat of Kalliasseri in Kannur District in North Kerala. However, the project ran into political and supply issues and had to be abandoned.
He was also instrumental in the launching of a joint venture company Bowthorpe Thermometrics India (P) Limited, with Bowthorpe of UK and Namtech Consultants (P) Limited to manufacture Thermisters (a temperature dependent Resistor) in 1996. Bowthorpe has since transferred its ownership to GE in October 2001. The Founder Chairman remained active in his closer field till his demise in 30 June 2015.