Captain Irene Streibich is of German (father) origin. Her mother's last name is Ramona so it can be speculated that she has Spanish or Latino roots. Her mother was a U.S. Army Blackhawk pilot and that's what gave her the notion to become a pilot as well.
As a Lieutenant, Streibich was a pilot recruited by Specialist Shauna Jarrett to fly a "Buzzard" at the direction of Emby (zPhone hacker aka Skippy the Magnificent) to activate Giant TerraWatt MASER Projectors under the surface of Paradise/Gehtanu.
She was promoted to Captain.