 Ramba uchinyora ndima ino - Jackson akawana menduru yake yokutanga huru, sirivha, mumakwikwi emamita 110 ane mhinganidzo, aine makore gumi nemapfumbamwe paMitambo yeCommonwealth ya1986. Akakurumidza kuzvisimbisa pachikuva chenyika, achitora menduru yebronze pa1987 World Championships muAthletics uye menduru yesirivha pa1988 Summer Olympics. Pashure pokukunda imwe sirivha mumamita 60 zvipingamupinyi pa 1989 IAAF World Indoor Championships, akakunda European uye Commonwealthmenduru dzendarama muna 1990. Mwaka wa1993 wakamuona achisvika pakakwirira mumutambo wake: mushure mekunge aenda sirivha ku1993 Indoor Worlds, akaenderera mberi nekuisa rekodhi yenyika ye12.91 masekondi kuti ave 1993 World Champion. Ichi chiratidzo chakanga chisina kukundwa kwamakore anenge gumi namatatu uye chinoramba chiri chinyorwa chenyika. Jackson akabatsirawo chikwata cheBritain chemamita mana pakumhanya 100 kuti chiwane menduru yesirivha. 