Rubuta ci gaba ga wannan sakin layi - Vernon ya fara zama a gasar wasannin motsa jiki ta kasa da kasa a gasar tseren tseren tseren kasa ta 2004 IAAF
inda ya yi gasa a tseren maza na matasa na mita 8,000; kammala na 64 a cikin lokaci na 27minutes da 12seconds. Gasar kasa da kasa ta gaba ta Vernon ita ce Gasar Tsere ta Duniya ta IAAF ta 2005 inda ya sake fafatawa a tseren matasa maza, a wannan karon ya kammala na 48. A gasar zakarun Turai ta matasa ta 2005 ya yi gasa a tseren mita 5000; kammala na 4 a cikin lokaci na mintina 14 da dakika 27. A watan Disamba na 2005 ya lashe lambar yabo ta farko ta kasa da kasa a Gasar Zakarun Turai ta Junior Cross Country wanda ya kammala na biyu a bayan Barnabás Bene na Hungary. Daga nan ya yi gasa a Gasar Cin Kofin Turai ta 2007 kuma ya gama na 3 a tseren maza na ƙasa da shekaru 23. A Gasar Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Wasannin Vernon ya yi gasa a gasar zakarun duniya ta Cross Country a shekarar 2008, inda ya kammala na shida. Hakanan a cikin 2008 shine 2008 IAAF World Cross Country Championships inda Vernon ya gama na 115 a tseren maza na 12kilomita. Babban gasa ta gaba ita ce Gasar tsere ta Turai ta 2008 inda ya yi gasa a tseren maza na ƙasa da shekaru 23. Ya gama na biyu a bayan dan Italiya Andrea Lalli. Vernon ya fafata a gasar cin kofin duniya ta hudu a shekarar 2009. Ya yi gasa a tseren maza na manya kuma ya gama na 78. A Gasar Zakarun Turai ta 2009 a Dublin Vernon ya yi gasa a tseren maza; kammala 12th.