Prof. Dr. Gurrappa is a Senior Scientist in Defence Metallurgical Research Laboratory (DMRL), Hyderabad, India, working in the field of Gas Turbine Engine Materials for about three decades. In addition to defense systems, he has been helping different industries in solving the corrosion problems and stressing the need of prevention of corrosion by using different advanced protective techniques. He has been recognized globally. He is the recipient of Prestigious Fellowships.He is also the recipient of 'Corrosion Awareness Award” and 'Meritorious Contribution Award” from NACE International India section in 2004 and 2010 respectively. He has received a number of best paper awards and delivered a number of invited lectures / talks, keynote addresses in various international /national symposia and chaired the technical sessions. He authored 200 publications, 9 books / book chapters and edited two books on Gas Turbines. He is an elected Fellow of Royal Society of chemistry, London and Andhra Pradesh Akademi of Sciences, India.