Rajiv Gauba, a Punjabi from Bihar and 1982 batch Jharkhand cadre IAS will be the new urban development secretary from the end of this month when incumbent Madhusudan Prasad retires. Three of his batch mates, G Gurucharan, Hem Kumar Pande and Jitendra Shankar Mathur have also been appointed as union secretaries. Know more about these 4 Union secretaries: