Krishna Ballabh Sahay popularly known as K. B. Sahay was born on 31 December 1898 at Sheikhpura in the Patna district of Bihar.
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He belonged to Hazaribagh and is survived by his sons and grandchildren who continue to dwell in the areas surrounding Hazaribagh - Tilaiya, Giridih, Patna and Delhi.
He was also an adjunct professor at the School of International Business, Queensland University of Technology and founding chairman of the Centre for Supply Chain Management.
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Prior to joining the IIM, Sahay was the director of the Management Development Institute (2009–2010, Gurgaon) and the Institute of Management Technology (2005–2009, Ghaziabad).