IN A sudden and unprecedented move, Cyrus Mistry — the chairman of $100 billion Tata Group— was removed on Monday, and chairman Emeritus of the Group Ratan Tata was recalled as its interim chairman. In the meantime, a panel was set up to search a new chairman within four months. Apart from Tata himself, this search committee will include Venu Srinivasan, Amit Chandra, Sushanta Kumar Bhattacharyya and a former Indian Foreign Service officer — Ronen Sen. But who’s this ex-diplomat? And why has he been roped in to select the next men at the helm of Tata Sons. Here it goes: