[1] He was the director of the National Coal Development Corporation (NCDC) and contributed towards the establishment of the Central Mining Research Station, which was later merged with CFRI to form the present day Central Institute of Mining and Fuel Research).

[5] He started his career as a research associate at the Department of Chemical Technology at Imperial College in 1942, but joined the Royal Air Force during World War II to serve as a Scientific Officer and, later, as the Head of the Fuel and Oil Research Section at the Royal Aircraft Establishment, Farnborough airfield.

[5] After his retirement from CFRI, he joined the United Nations as an advisor and served in Chile when he died on 26 August 1975, two days after his 60th birthday, succumbing to a cardiac arrest.

[5] Lahiri's research interests covered the fields of petrography, oxidation mechanisms, solvent extraction, surface chemistry of coal, catalysts and adsorbents and he was credited with several innovations in fuel technology, which earned him over 90 patents.

[1] His contributions have been reported in the development of beehive coke oven, process technologies for the isolation and recovery of useful chemicals from the byproducts of coal, process technologies for the production of resins and other compounds, and active carbon and ion exchangers for determination of water-based coal.