Her job was apparently influence coordinator.
Via Daily Mail:
Hillary Clinton’s chief of staff Cheryl Mills’s received nearly 150 phone messages from Clinton Foundation’s operations director Laura Graham during a two year span at the State Department, according to phone logs – a significantly higher number of calls than from any other individual during that time frame.
The phone logs, which were obtained by Fox News and cited by reporter James Rosen during the State Department press briefing on Monday, raise fresh questions about the close contact between the Clinton Foundation and Clinton’s State Department office during her tenure.
State Department spokesman Mark Toner confirmed during the briefing that he had seen the phone logs, which showed Mills had received nearly 150 calls from Clinton Foundation COO Laura Graham.