Carlo was a Vim Ambassador, whose role was to wear power armor with a custom paint job. He was to travel with an advertising truck and hand out bottles of Vim, answer questions and give contact information for the Vim sales and distribution team.
He was warned by Willis Rudd that he was "literally walking around with a target painted on his back" for the saboteurs against the company, as several shipments were lost, property stolen, and employees assaulted.
He continued with his job until the eruption of the War, killing him. His skeleton can be found in the back of a truck north of the National Park visitor's center, with his custom-painted T-51 power armor.