Pandey started playing cricket when he was in the third grade. He did his schooling in Kendria Vidyalaya ASC center. His coach was Mr.Satish who trained him from childhood till he joined KSCA. His coach is a former coach of Karnataka, Haryana and Odisha. Manish was a member of the victorious Indian team that played in the 2008 Under-19 World Cup held in Malaysia. He was selected for the Mumbai Indians' squad in the 2008 season of the Indian Premier League. He is also the first Indian to score a century in the IPL. He was picked up by the Kolkata Knight Riders in the Indian Premier League 2014. He was the man of match in the finals of IPL-7 (2014) with a match winning innings of 94 for Kolkata Knight Riders against Kings XI Punjab.