The chair of parliament's intelligence and security committee has warned Australians must remain "vigilant" against the threat of foreign interference.
The warning comes after a British national working in Westminster as a parliamentary researcher was accused of feeding information to Beijing.
Labor MP Peter Khalil said regardless of current security clearance processes, which he described as a "pretty deep dive", everyone needed to be alert for attempts to sow discord and division.
"People really have to be aware and be vigilant of those attempts," Mr Khalil told ABC radio on Tuesday.
"The security agencies and the intelligence agencies are responsible for the vetting of staff.
"It's a pretty deep dive ... and that occurs with across departments and the government and the parliament."
It comes after Liberal frontbencher James Paterson said there was a good case for security vetting of Parliament House workers because the risk of a Chinese spy undermining Australia's political processes was "very high".
Mr Khalil said it was an "ongoing conversation" whether there should be an increase in the vetting of staff.
"Our security agencies work pretty much around the clock to ensure that there is no, or there's a mitigation of any, attempts at foreign interference within our democratic institutions," he said.
"They do a pretty good job of it."
A spokesman for Home Affairs Minister Clare O'Neil said the government "will always follow security advice from intelligence agencies, including in relation to security vetting".
The British man, aged in his 20s, has denied the allegations.
