Ravi Shankar Singh , with over two decades of experience, is MD for Colliers’ Residential Transaction Services in India and will be based in Gurugram.National Investment and Infrastructure Fund (NIIF) has appointed Sanjiv Aggarwal as CEO and MD of NIIF at a time when it has stepped up investments. Jindal Stainless has approved elevation of Tarun Khulbe as its chief executive and whole-time director.IAS officer Maheshwar Rao is now the MD of Bangalore Metro Rail CorporationAruna Nayar has been appointed the Railway Board Secretary.Saket Dalmia on India Sotheby’s International Realty Board, as President, will play an integral role as it targets $1 billion in its 10th year of operations.