Al Halabi's home base was Travis Air Force Base in California, but he served nine months at Guantanamo Bay as a translator between the detainees and investigators.
The military charge sheet against al Halabi lists more than 30 violations, which include connecting his personal laptop computer to the military's computer system to download classified documents.
Al Halabi, an American of Syrian descent, allegedly e-mailed information that included details about the base's flight schedule to contacts in Syria, officials said.