Sumit Kumar completed his Post Graduate Diploma in Personnel Management at the Xavier Institute of Social Service (XISS), Ranchi, in the 2005–07 batch. A Physics graduate from Hajipur, he began his career as a Probationary Officer with the State Bank of India at its Banjara Hills Branch in Hyderabad, before joining IndianOil as an HR Officer at Bongaigaon Refinery in March 2008.
At present, he is Chief Employee Relations Manager at IndianOil, posted at Paradip Refinery.