The Indian Space Research Organisation (ISRO), established in 1969, has seen a transformative journey under the leadership of various distinguished chairmen. Each chairman has contributed uniquely to India's space program, carving a niche for the country in the global space community.

Vikram Sarabhai, known as the father of the Indian space program, was the first chairman of ISRO. His vision was crucial for establishing a space agency that would harness space technology for national development. After his sudden demise in 1971, Satish Dhawan took over and served until 1984. Dhawan's era was marked by significant developments, including the launch of India's first satellite, Aryabhata, in 1975, and the initiation of the Satellite Launch Vehicle (SLV) program.

Following Dhawan, Prof. Udupi Ramachandra Rao stepped in, steering ISRO from 1984 to 1994. Rao's tenure is best remembered for the commissioning of the Polar Satellite Launch Vehicle (PSLV), a reliable workhorse launcher for ISRO.

K. Kasturirangan, who led ISRO from 1994 to 2003, accelerated the development of the Geosynchronous Satellite Launch Vehicle (GSLV) and the creation of new application-centric satellites. Under his leadership, ISRO focused heavily on satellite-based telecommunications and Earth observation.

G. Madhavan Nair, chair from 2003 to 2009, saw through the completion of the GSLV and the launch of Chandrayaan-1 in 2008, marking India's first mission to the Moon. This mission underscored India's capabilities in deep space missions.

K. Radhakrishnan, serving from 2009 to 2014, took ISRO to new heights with the launch of the Mars Orbiter Mission (Mangalyaan) in 2013. This mission was particularly noteworthy as India became the first Asian nation to reach Martian orbit and the first in the world to do so in its maiden attempt. The success of Mangalyaan placed India among a select group of nations capable of interplanetary travel, promoting India’s cost-effective space technology on a global platform.

The subsequent chairman, A.S. Kiran Kumar (2015-2018), focused on enhancing satellite navigation systems and extending the applications of space-based technologies for everyday use.

Most recently, K. Sivan held the position from January 2018 to December 2021. Under his leadership, ISRO embarked on ambitious projects like the Chandrayaan-2, intended to explore the lunar south pole. Sivan is also known for initiating the Gaganyaan project, aimed at launching India’s first manned space mission.

S. Somanath took charge in January 2022, continuing the legacy of his predecessors by further expanding ISRO’s horizons with advanced satellite launches, lunar exploration missions, and collaborative international space projects.

ISRO's evolution under each chairman reflects a journey of technological advancement and strategic foresight, contributing significantly to India's standing in the global space community.