Here is a piece from the Rule Book about him -
The Vanguard Hurley is a tactical mobile combat information centre that interfaces with the Vanguard tactical network. Designed to provide Vanguard troopers with defensive and offensive support, the Hurley fulfils multiple roles through the use of autonomous drones that respond to the Hurley AI’s own instruction. The Hurley uses a class obsidian firewall, and is capable of preventing network intrusion and viral attack on the Vanguard Tac-Net.
Here is the original concept from Steve Tappin -