Ar. Ayan Sen was one of the key organizing members of the IUDI Natcon 2025 held in Kolkata between 7th and 8th March, 2025 at Taj Bengal, on the theme ‘Cities in Transition: Inclusion through Urban Design.’ The event consisted of Leading Urban Designers of India and some eminent international speakers, administrators and key stakeholders who play a vital role in development of Urban atmosphere. Ar. Ayan Sen also chaired a key session where he was involved in a session with Industrialist Harsh Neotia also he served as a speaker in the concluding session discussing the core essence of the conference.