A NAB insider accused of using his position at the bank to deliver around $10 million worth of dodgy business loans is accused of being part of a major fraud syndicate.

The Sydney man's arrest is the latest in a string of busts targeting a group that allegedly used stolen personal information to apply for loans to buy non-existent luxury "ghost cars".

The 36-year-old was hit with 19 charges after he was arrested in the city's southwest on Thursday.

NAB, who worked with NSW Police on the matter, confirmed the man's employment had been terminated, adding the bank had zero tolerance for criminal conduct.

No customers had been impacted by the alleged fraud, it confirmed.

The man was the 15th person charged by a NSW Police strike force targeting the same syndicate, while the NSW Crime Comm

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