He leads a gang-turned-company outfit specializing in manufacturing weapons and ammunition that operated in the Los Angeles area from 2130s to early 2160s. He is a large man, concerned with the well being of his subordinates.
Exterminate the deathclaws: The player is asked to help them get rid of the deathclaw nest outside the factory, which is preventing the Gun Runners from extending their trade routes to other gangs in the LA area.
Get weapons for the Blades: The Blades need more weapons to get the Regulators out of Adytum. Talking to Gabriel about it, he will direct you to Zack instead.