Member, Program Advisory Committee, LIGO Lab., USA
Council Member of the LIGO Scientific collaboration.
Spokesperson, IndIGO (Indian Initiative in Gravitational Wave Observations) consortium.
Member of the Editorial Board, Current Science (Indian Academy of Sciences)
Member of the Editorial Board, Current Science (Indian Academy of Sciences)
Member, PRSG, MEITY
Spokesperson, LIGO-India (Science). (till Oct 2022)
President, Indian Association for General Relativity & Gravitation (IAGRG) [March 15, 2016-2018].
Member Secretary, LIGO-India Scientific Management Board (till Oct 2022)
PI, LIGO-India-Training, R&D (till Oct 2022)
LIGO-India coordinator-IUCAA (till Jul. 2019).
Member of the Planck HFI Collaboration: HFi core team member.
Member, Executive Council, Indian Physics Association (2021-22)
Member of the Editorial Board, New Journal of Physics (IOP) [2009-2015].
Chair, SOC of Amaldi-14: Melbourne, Australia July 2021.
Member, SOC of 30th Texas Symposium On Relativistic Astrophysics, Portsmouth, UK, Dec 2019.
Member, Program Advisory Committee, DST, 2011-2015.
Member, SOC, “Focus Meeting” on “The Legacy of Planck” at the IAU General Assembly, August 2015 in Honolulu, Hawaii, USA.
Member, National Organising Committee, National Space Science Symposium, NSSS-2013.
Member, SOC of GR-20: 20th International conference on General Relativity & Gravitation, Poland, July 2014.
Member, Organising Committee, Indo-UK FoS meeting, Khandala, Oct 8- 10, 2014.
Invited plenary speaker for GR-19: 19th International conference on General Relativity & Gravitation, Mexico City, July 2010.
Member, SOC of GWPAW-12: Gravitational wave Physics & Astronomy, Hanover, Germany July 2012.
Adjunct faculty at Dept. of Theoretical Physics (DTP), TIFR, Mumbai (2012-14)
Adjunct faculty at International Centre for Theoretical Sciences (ICTS- TIFR), Bangalore (2011-13).
Member Programs Committee, International Centre for Theoretical Sciences (ICTS), TIFR. (2008-10, 2011-now).
Hony. Visiting Professor, Centre for Theoretical Physics, Jamia Milia Islamia, New Delhi (2015-18).