Dr. rer. nat. Rajinder Singh is Member of the the Advisory Committee for: Center for the History and Philosophy of Science, Technology and Education, University of Jadavpur, Kolkata. Apart from that he is a Member of the following Scientific Societies:

  1. European Physical Society (2009-2011) 
  2. German Physical Society/History of Physics & Didactic of Physics  (1998-...) 
  3. German Soc. Sci. Med. & Tech (2005-2020) 
  4. Scientific Instrument Commission (1998-...) 
  5. Education and Science Union (2005-...) 
  6. European Society for the History of Science (2004-...) 
  7. Astronomical Society (AG-HA) 
  8. "Jugend forscht eV", Hamburg (2005-2019) 
  9. Bulgarian Soc. Chem. Edu. & Hist. & Phil. Chemistry 
  10. Member of Editorial Board - Indian Journal of History of Science (2016-2019).
  11. Science and Culture, Kolkata, ISNA, (2015-...).
  12. Memeber of Selection Committee, Heinrich Boell Foundation (2014-2019).