After his academic career at the University of Sri Lanka, Chris Defonseka pursued a career in plastics technology, specializing in polyurethane and expandable polystyrene foams. He has trained and worked at some of the largest chemical companies in the world such as- ICI, Bayer AG, BASF, Huls AG, Hoechst AG, CIBA Geigy, BP Chemicals, Canon, R.H. Windsor in Europe, India, Switzerland, Germany, Singapore and Malaysia.
His creative expertise enabled him to design and fabricate - Styrofoam boxes for transport of human eyes for the first time in the world, a coating machine for artificial leather, a small plant for EPS products manufacture and a complete foaming and cutting system for flexible polyurethane foams. Also pioneered the manufacture of flexible PU foam in Sri Lanka.
Currently he is a consultant to CESO, a Canadian international agency, in addition to being a technical writer to local plastics magazines.