Milutin is a member of Duty faction who appeared in S.T.A.L.K.E.R.: Clear Sky.
He is guarding the entrance of the main entrance to the Agroprom research center from the Garbage with Fyokl and Mister and Bandicoot. They replaced a squadron of Duty members who went back to the base with Scar and keeps guard over the area, before that they were seen in Kolobok's bar in the Duty base. They don't do much except guard the entrance.