Dean Mozian was a member of Raynor's Raiders in the SceeVee Special Engineering Corps.
Mozian was pulled from indentured servitude in a Cirion sweatshop by Bill "Pearly" Bousquette to join his SceeVee Corps, and became the Corps's balistics expert. During their operation on Gurdlac, the squad ran into a zerg tripwire, and Mozian had a zergling start tearing into his SCV. Pearly managed to grab and kill the zergling in time, saving his life.
References
Bogdanove, Kal-El. "The Fightin' SceeVees." (May 30, 2013). Blizzard Entertainment. StarCraft Lore: The Fightin' SceeVees Accessed 2013-05-30