Mr. Lahiri had the enviable opportunity to be closely associated with a number of high profile committees and institutions. Some of the most significant memberships are

• Chairman of IETE, Kolkata
• Fellow, Institution of Engineers (India), Chartered Engineer
• Fellow, Institution of Electronics and Tele Communication Engineers (IETE)
• Fellow of Computer Society of India
• Chairman, Institution of Engineers (India), Computer Engineering Division
• Chairman Emiratus in BCCI (Bengal Chamber for IT Committee) and Chairman Education Committee
• Member, IEEE USA, Executive Committee, Calcutta Chapter
• Life Member and Past Chairman, Computer Society of India, Kolkata Chapter
• Life Member, Calcutta Management Association