<prompt> Pedzisa mutsara unotevera: Akazvarwa muCobh, County Cork, OSullivan akadzidza paCobh Community College. Akapedza chitupa chake chokupedza kudzidza muna 1987. Makwikwi makuru okutanga aOSullivan enyika dzakawanda akanga ari  <response>: 1990 European Championships muSplit, kwaakapedza ari wechi11 mumakwikwi e3000 m. Zvisinei, OSullivan akavandudza nokukurumidza pashure pacho, uye musi wa 26 January gore rakatevera racho, muBoston, akaisa rekodhi itsva yenyika muimba yakavharwa mumakwikwi emamita 5000 e15:17.28, achitora masekondi anopfuura mashanu kubva pane rekodhi yekare. Panguva iyoyo, OSullivan uyo akawana chikoro chemitambo aidzidza accounting paVillanova University muUS, uye paWorld Student Games kuSheffield muna Chikunguru 1991, akahwina menduru yegoridhe pa1500 m muna 4:12.14, uye menduru yesirivheri pa3000 m muna 8:56.55. Pakutanga kwa1992, akapedza 7th muWorld Cross Country Championships. 