Isha Ambani, the daughter of world's top billionnaire Mukesh and Nita ambani has joined the US company McKinsey. Reliable sources say that Isha has joined as consultant in McKinsey. Mukesh is the richest Indian business tycoon and runs the Reliance empire. A brilliant student, Isha is the recipient of several prestigious awards including International Baccalaureate programme. The billionaire’s heiress also holds her own stake in her father’s “Reliance Industriesâ€, estimated at about 80 million dollars.