| He was born into a poor family. |
| His father, Kailasavadivoonadar, was a paddy and mango farmer. |
| Sivan helped his father in the farmlands and sold mangoes in the market. |
| His siblings couldn't pursue higher education due to financial constraints. |
| His first school was a small Tamil-medium school near his home. |
| Sivan was known for being calm and studious. |
| He excelled in Mathematics, scoring 100% in BSc without tuition. |
| He was the first graduate in his family and village. |
| To support Sivan's education, his father sold land and borrowed money. |
| Sivan went barefoot to school and wore 'dhoti/lungi' before MIT. |
| He earned the nickname 'Rocket Man' for his work on cryogenic engines. |
| Sivan specializes in 6D trajectory simulation software. |
| He joined ISRO in 1982 and led various rocket programs. |
| Sivan took over as ISRO chairperson in January 2018. |
| Under his leadership, Chandrayaan 2 was launched in July 2019. |
| He is known for his religious beliefs and temple visits. |
| During a speech in 2023, Sivan shared his journey from rejection to leadership. |
| Sivan recounted being called "useless" at ISRO's Satellite Center. |
| Despite doubts, he successfully led the GSLV project. |
| Sivan's determination led to the success of the GSLV project. |
