Buuxi weedha soo socota: Vernon ayaa markii ugu horreysay ka qeyb galay tartan caalami ah oo fudud oo ka dhacay 2004 IAAF World Cross Country Championships halkaas oo uu ku tartamay tartanka ragga ee 8,000-mitir; isagoo dhammaystiray 64aad waqtigii 27 daqiiqo iyo 12 ilbiriqsi. Vernon tartankiisa caalamiga ah ee soo socda wuxuu ahaa 2005 IAAF World Cross Country Championships halkaas oo uu mar kale ku tartamay tartanka ragga da'da yar, markan wuxuu dhammeeyey 48aad. Sanadkii 2005 tartankii horyaalka Yurub ee ciyaaraha fudud ee da'yarta wuxuu ku tartamay orodka 5000 mitir; isagoo dhamaystay kaalinta 4aad waqtigii ahaa 14 daqiiqo iyo 27 ilbiriqsi. Bishii Diseembar 2005 wuxuu ku guuleystay billaddiisii ugu horreysay ee caalamiga ah ee Horyaalka Yurub ee Junior Cross Country isagoo ku dhammeeyay kaalinta 2aad ee ka dambeeya Barnabás Bene oo reer Hungary ah. Kadib wuxuu ku tartamay
2007 European Cross Country Championships oo ku dhammaystay kaalinta 3aad ee tartanka ragga ee ka yar da'da 23. 2007 tartankii ciyaaraha fudud ee Yurub ee ka socda da'da 23 jirka Vernon wuxuu ku tartamay 5000 mitir wuxuuna dhammeystirey kaalinta toddobaad waqtigii ahaa 13 daqiiqo iyo 59.24 ilbiriqsi. Vernon wuxuu ku tartamay 2008 World University Cross Country Championships, isagoo ku dhammeeyay kaalinta lixaad. Sidoo kale 2008 waxaa jiray 2008 IAAF World Cross Country Championships halkaas oo Vernon uu ku dhammeeyay 115th tartanka 12km ee ragga da'da weyn. Tartankiisii xigay ee ugu weynaa wuxuu ahaa 2008 European Cross Country Championships halkaas oo uu ku tartamay tartanka ragga ee ka yar da'da 23. Waxa uu kaalinta labaad ka galay ciyaaryahanka reer Talyaani ee Andrea Lalli. Vernon wuxuu ku tartamay tartankiisii afaraad ee World Cross Country Championships ee 2009. Waxa uu tartamay tartanka ragga da'da weyn waxaana uu galay kaalinta 78aad. Tartanka Yurub ee 2009 ee Dublin Vernon wuxuu ku tartamay tartanka ragga ee ragga; dhamaystirka 12aad.