Chemtai participated in the 2018 FIVB Volleyball Women's World Championship and 2019 FIVB Women's World Cup. She is a member of the team in the women's tournament at the delayed 2020 Summer Olympics. The Kenya national team set off for the Olympics in Tokyo in three batches to try and minimise the chances of being effected by the COVID-19 pandemic. Their opening match will be on 25 July in Tokyo against Japan.