The Charger works for the Mendoza Cartel.
When James left Camila, The Charger followed him. As of season 3, he is working for the Mendoza Cartel because James has aligned himself with Teresa.
El Engaño Como La Regla: When they realize that they are in debt to the Colombians, he suggests that they sell Teresa to Epifaño for five million dollars to pay it off.
Punto sin Retorno: The Charger hurries everyone along, forcing them to pack faster. He tells Teresa that she has 5 hours to get back from her deliveries. Teresa sneaks a bag of cocaine off one of the counters and slips it into her bag before exiting the building.
La Fuerza: James tells Teresa and Pote that The Charger and Tonto will be working for them.