Kammala jumla mai zuwa: Herdman ya kasance babban kocin kungiyar kwallon kafa ta mata ta New Zealand daga 2006 zuwa 2011. Lokacin da ya isa New Zealand kuma ya shiga shirin kwallon kafa na kasa a shekara ta 2003, ya fara aiki a matsayin Manajan Ilimin Kocin kuma daga baya a matsayin Daraktan Ci gaban Kwallon kafa. Yin aiki tare da kungiyoyin mata na kasa, ya jagoranci tawagar U-20 zuwa gasar cin kofin duniya a 2006 kuma daga baya aka sake masa suna U-20 World Cup a 2007.
Shekarar 2010. Ya kuma jagoranci manyan 'yan wasan zuwa gasar cin kofin duniya ta mata ta FIFA a 2007 da 2011 da kuma wasannin Olympics na bazara na 2008 a Beijing.