Faatumu le fuaiupu lenei: O Constien e sau mai Vail, Colorado ma na faauu mai le Battle Mountain High School i le 2014. Na auai o ia i le Iunivesite o Colorado ina ua uma le aoga maualuga ma le faamoemoe e avea ma inisinia o le siosiomaga. O Constein e tauva mo le Tracksmith Amateur Support Program aʻo aʻoaʻoina e Mark Wetmore ma Heather Burroughs. I le 2015, na tauva ai Constein i le
IAAF World Cross Country Championships i Qingzhen, Guiyang ua maeʻa i le tulaga 62.