 Nyorai mberi kweiyi ndima - Karunasekara akanyoresa muSri Lanka Army seOfficer Cadet muna 1981, achienderera mberi nekuwana komisheni yake seMutevedzeri wechipiri muSri Lanka Light Infantry mushure mekupedza kudzidziswa kuSri Lanka Military Academy, Diyatalawa muna 1984. Mumakore 35 akatevera, akakwira muuto rose, achiita mabasa anokosha akadai soMutungamiriri weMasoja, Mutungamiriri weVashandi, Mukuru Mukuru weDhipatimendi reMidziyo, uye Munyori weMasoja. Karunasekara akabata zvose battalion- uye brigade-level mirairo panguva ye Eelam War, uye akarayira Chikamu chechi 53 mukati mayo. Pamusoro pezvo, akagadzwa semutungamiri weSri Lankan contingent yeUN kuchengetedza runyararo muHaiti MINUSTAH payakatanga kutumirwa muna 2004. 