Pedzisa mutsara unotevera: Herdman akanga ari murairidzi mukuru wechikwata chenyika chebhola revakadzi cheNew Zealand kubva muna 2006 kusvika muna 2011. Paakasvika muNew Zealand uye akabatana nehurongwa hwenyika hwekubatana nhabvu muna 2003, akatanga kushanda saMurairidzi weDzidzo uye gare gare saMutungamiriri weFootball Development. Achishanda nezvikwata zvevakadzi, akatungamira timu yeU-20 kuenda kuWorld Championship muna 2006 uye yakazotumidzwa zita rekuti U-20 World Cup muna
Gore ra2010. Akatungamirirawo chikwata chevakuru kuFIFA Women's World Cups muna 2007 na2011 pamwe ne2008 Summer Olympics muBeijing.