At some point before 2038, Ezra joined the Seraphites and lived on the island a short boat ride from Seattle. They were skilled with tools, crafting knives for members within the community.
Events of The Last of Us Part II
In April, 2038, Lucia and Marcus ordered Ezra to make boning knives for them, with August agreeing to convince him to do so for the pair. In exchange, he would get the hide from a recently-killed deer.