Dr. APJ ABDUL KALAM was an Aerospace Engineer who worked in ISRO (at the beginning it was know as the INCOSPAR) from its starting year. He is know as the Missile Man of India as most of the missiles India have, were designed by him. Apart from this Dr.Kalam came from a very middle class background & still he made it big, which is a great motivational stories for generation of students. He was the 11th President of India. To know more about him you can consider the wikipedia or by visiting the link below:

https://en.wikipedia.org/wiki/A._P._J._Abdul_Kalam

You can also read some of his books such as 'INDIA 2020', 'WINGS OF FIRE', 'IGNITE MINDS' etc.

I hope my answer provides you a brief. To know in detail consider the link provided above.

Wish you a great day!