1. Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
2. Homi Bhabha National Institute, Kalpakkam, India
3. Physical Metallurgy Division,Indira Gandhi Centre for Atomic Research, Kalpakkam, India
4. Raja Ramanna Fellow, Department of Atomic Energy, Mumbai, India
5. Presently at AUSC Mission Directorate, Noida, India