According to reports, 28-year-old Ali Alosaim, enrolled on a three year Merchant Navy officer course at the prestigious Marine School at South Tyneside College fled to Syria.
Born in Kuwait, his personal details were found under a cache of ISIS documents leaked to The Mail on Sunday.
Alosaim mentioned himself as a 'navy officer in Britain' on the entry form, which is used by ISIS to track foreign fighters.
This revelation has also triggered security threat to ships and ferries in the country.
'Someone with his knowledge opens up a whole new area where terrorism can take place,' said Former Royal Navy chief Admiral Lord West.
He was radicalised by watching videos of killings in Syria committed by President Bashar Assad's troops. He is even yet to complete his course to get marine license.
He is not in touch with his family since 2013.