A security guard has been sacked after he was caught using the security cameras at Darwin International Airport to perv on women.

The pervert was among a group of other security officers who allegedly gathered around the screens in the security room - but instead of looking out for suspected terrorists or criminal activity inside the airport they checked out women's breasts.

A source told the Northern Territory News the men - and one female worker - used the hi-tech security surveillance system to zoom in on well-endowed women wearing low-cut tops as they walked through the airport.

One woman was allegedly watched on the screen for at least five minutes as she went through a ground-level security check point. The group all worked for national security company MSS Security.

But only one of them lost their job. The source said it was an "absolute disgrace".

"They've got about nine screens in the room on different angles and they can zoom in and out, left and right," the source said.

"They were using it to their advantage - they were looking at young women's chests and some of them looked like they were under the age of 18.

"It's disgusting and I think they all should have been disciplined."

MSS Security NT manager Jamie Adams would not talk about the allegations when contacted by the NT News yesterday.

"I'm not in a position to comment as part of our contract," he said.

And airport chief executive Ian Kew also refused to comment. "I'm not going to talk about it - no comment," he said.

He did not deny that a security officer had been sacked for inappropriate behaviour.

The security officers were caught out in late September after the recorded tapes were viewed.

The matter was not reported to NT Police.