Veteran diplomat S Jaishankar, who served as the Foreign Secretary from January 2015 to January 2018, was sworn into PM Narendra Modi's Cabinet on Thursday. Upon retirement, Jaishankar joined Tata Sons as President of Global Corporate Affairs in April last year. A Padma Shri awardee, the 64-year-old played a key role in the negotiation of the US-India Civil Nuclear Agreement.