Medium Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 14
Situational Awareness; Communication Breakdown; Confusion
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic; Flight Crew Became Reoriented
Airport; Human Factors
Aircraft X called ready to taxi and I taxied him to Runway 30 Right at C. I told Aircraft X 'taxi to Runway 30 Right at v via victor and Charlie cross Runway 30 Left.'  The pilot called on [taxiway] short of Runway 30 Left and I again told him to 'cross Runway 30 Left hold short of Runway 30 Right and contact tower. He read back; 'cross Runway 30 Right and hold short of Runway 30 Left.'  My supervisor was [listening] to ground frequency and told me he read back cross Runway 30 Right. I told local he read back cross Runway 30 Right and local told him to hold short of Runway 30 Right.I did not hear the incorrect read back and only knew of it when the supervisor told me.
Controller cleared aircraft to cross the left runway and hold short of the right runway. Pilot readback was cross the right runway. Bad readback caught by Tower Supervisor monitoring the frequency.