Kosala Kulasekara is a big-hitting 6' 1" batting allrounder who has been a regular performer in domestic cricket for Nondescripts CC in the Premier tournament and Ruhuna in the Inter-provincial tournament. His approach to the game is more suitable for the one-day and T20 formats where he has excelled in domestic matches. In 2010 he hit a whirlwind 43 off 15 balls against Basnahira North in the inter-provincial T20 match and captured four wickets for 26 with his nippy deliveries to help Ruhuna convert a losing cause into a winning one.

Kulasekara first began as a swimmer and won third place in the all-island swimming championships and cricket was only his second love. At Vidyartha College, Kandy he learnt his cricket and showed so much promise that he was selected to captain the Central Province Under-17 and U-19 teams. He was eventually selected to play for Sri Lanka in the U-19 World Cup in 2004 where he won two Man-of-the-Match awards for his all-round ability.

After joining NCC, he was coached by former Sri Lanka cricketers Romesh Kaluwitharana and Chandika Hathurusingha who helped improve his batting technique. Kulasekara won a cricket scholarship to England in 2005 along with Upul Tharanga. He captained Sri Lanka Cricket Academy against England Academy and South Africa 'A' teams.