India’s space program is facing an unexpected challenge due to a significant exodus of experienced scientists from the Indian Space Research Organisation (Isro). Over 100 scientists have either resigned or taken voluntary retirement from the agency in recent months. In response, the Department of Space (DoS) has issued a directive to restrict resignations and voluntary retirements for scientists involved in key missions such as Gaganyaan. While this move underscores the importance of retaining talent, it raises questions about why scientists are leaving Isro at a time when India’s space ambitions are at an all-time high.
Reasons for the Exodus
Industry experts and senior officials at Isro attribute the departures to a combination of factors, including the rapid growth of India’s private space sector, organizational bottlenecks, and uncertainty surrounding major national missions. One of the primary drivers of this trend is the emergence of a vibrant private space ecosystem. Since the space sector was opened to private participation in 2020, startups like Skyroot Aerospace, Agnikul Cosmos, Pixxel, Bellatrix Aerospace, Dhruva Space, and Digantara have transformed India’s aerospace landscape. These companies are developing rockets, satellites, propulsion systems, and space-based services at an unprecedented pace.
For Isro scientists, the appeal of private sector opportunities is clear. Private companies typically offer significantly better salaries, stock options, and greater flexibility, along with the chance to work in dynamic environments where ideas can quickly transition from concept to implementation. In contrast to traditional government organizations, startups also provide leadership roles earlier in a scientist’s career and the opportunity to develop entirely new technologies.
This trend is further reinforced by former Isro veterans who have established or mentored aerospace startups, creating an ecosystem that increasingly attracts talent away from the national space agency. Their experience, combined with growing private investment, has opened career paths that previously did not exist for India’s aerospace engineers.
Organizational Challenges
The departures coincide with an unusual slowdown in mission execution at Isro. Several high-profile missions, including the Gaganyaan G1 test flight, SSLV-L1, GSLV-F17, and the industry-built PSLV-N1, have missed their projected timelines. The twin PSLV setbacks earlier this year have further delayed launch activities, and the agency has yet to publicly release a detailed failure assessment.
There are also concerns within Isro regarding the centralization of decision-making. Current and former officials have suggested that major technical and administrative decisions are now concentrated within the Chairman’s Office, which has slowed approvals and limited operational flexibility.
Need for Employment Model Reform
Senior officials have indicated that Isro should consider adopting employment models similar to those of western space agencies like NASA and the European Space Agency, which often utilize project-based staffing. NASA’s workforce structure includes permanent civil servants, contractors, and project-specific hires, providing flexibility while retaining critical institutional expertise. Many space policy experts believe Isro could benefit from expanding to this hybrid model.
As India’s private space ecosystem continues to grow, Isro can focus on mission design, systems engineering, human spaceflight, deep-space exploration, and advanced research and development, such as reusable rockets and nuclear propulsion.
Efforts to Retain Talent
The DoS’s memorandum from July 14 reflects concerns that the departures are impacting nationally significant programs. Scientists involved with Gaganyaan and other flagship missions will now require clearance from the Department of Space for resignations, rather than following routine approval processes. Although the number of departures represents a small fraction of Isro’s workforce of over 14,600 employees, the impact is substantial due to the specialized expertise of those leaving, gained through missions like Chandrayaan-3, SpaDeX, and Gaganyaan. This expertise cannot be easily replaced by recruiting new graduates.
The shift in talent also indicates a broader transition in India’s space sector. For decades, Isro was the primary destination for ambitious aerospace engineers, but it is now part of a larger ecosystem where private companies offer competitive compensation, faster career advancement, and the chance to influence the next generation of space technology. For Isro, the challenge is not only attracting the brightest minds but also retaining them.
