Rey Guerrero is the leader of a trio of mercenaries that can be hired to accompany the Star Player to Fort Daggerpoint during the quest Journey To The Deep. He and his associates, Quisha and Mogoui, can be found in the Ram Shack saloon in Union City once the Star Player has started Journey To The Deep.
At first, he refuses to take part in the expedition, but after using barter skill he agrees to join for $ 500 NCR, with a slightly higher check of barter price can be reduced to $ 200. Important note: Ray Guerrero accept payment ONLY in NCR currency, you can not pay him in caps.
After the start of the quest "Destroy Fort Daggerpoint" you can again meet Ray in that bar, with another pair of mercenaries, Mark and Kez. This time he requires a fee of $ 10,000, with charisma check you can bargain for a reduction in the amount of up to $ 8,000. The price is too high, his fighters are not worth so much.
Rey Guerrero is armed with a unique NPC-only sniper rifle, equivalent to "This Machine" by stats.