Petty Officer Wolfe was a member of Raynor's Raiders in the SceeVee Special Engineering Corps.
During their operation on Gurdlac, Wolfe was the first to begin mining for minerals on the planet. This unfortunately awakened the zerg lying in wait underneath the base, and the ground opened up beneath him. Wolfe was devoured by a swarm of zerglings.
References
Bogdanove, Kal-El. "The Fightin' SceeVees." (May 30, 2013). Blizzard Entertainment. StarCraft Lore: The Fightin' SceeVees Accessed 2013-05-30