Buuxi weedha soo socota: Herdman wuxuu ahaa tababaraha kooxda kubadda cagta dumarka ee New Zealand laga soo bilaabo 2006 ilaa 2011. Markii uu yimid New Zealand oo uu ku biiray barnaamijka kubbadda cagta ee qaranka 2003, wuxuu markii hore u soo noqday Maareeyaha Waxbarashada Tababaraha ka dibna wuxuu noqday Agaasimaha Horumarinta Kubadda Cagta. Isaga oo la shaqeynaya kooxaha haweenka qaranka, wuxuu hogaamiyay kooxda U-20 ee Koobka Adduunka 2006 iyo markii dambe loo beddelay U-20 World Cup ee 2006.
Sanadkii 2010. Waxa uu sidoo kale hogaamiyay xulka qaranka ee Koobka Adduunka Haweenka ee FIFA 2007 iyo 2011 iyo sidoo kale ciyaarihii Olombikada ee Beijing 2008.