Zyrell was born on Cait and while he didn’t spent a lot of time around his own family he travelled around a lot from one outpost to another. Eventually after he graduated with honours he realized he wanted to marry and he and his love married and had one child.
When his wife was killed his aunt came to take care of the child but kept her near the Solaria Gateway that would lead to the Delta Quadrant. He was in the Beta Quadrant working as SWAT Team Lead for the USS Phoenix.
Zyrell was the lead in the SWAT Team for the USS Phoenix before it was disbanded. He is still in the Marines but he is on special assignments and his whereabouts are unknown.