Complex sentence: Sumant has served as the Chairman at the National Retail Committee of CII, he was also a Member of Board of Advisors at the Conference Board, India and was earlier on the SIPA Advisory Board at Columbia University.
Split into simpler sentences: Sumant has served as the Chairman at the National Retail Committee of CII. He was also a Member of Board of Advisors at the Conference Board, India and on the SIPA Advisory Board at Columbia University.