Disruptions are expected at international airports around Australia this morning as immigration department officials participate in rolling industrial action.

The Community and Public Service Union (CPSU) said its members in the Department of Immigration and Border Protection are stopping work for four hours to protest against pay cuts and conditions.

CPSU national secretary Nadine Flood said passengers should arrive early and be prepared for delays.

"We will see rolling strikes at international airports around the country," she said.

"We're expecting the major the major impact of delays to be in the busy morning peak.

"That's unfortunate but these workers feel they have no choice after a more than a year of attacks on their rights and pay.

"Of course the target here is not the community, it is the Government."

Australian Border Force said there are arrangements in place to protect Australia's borders and minimise the impact on operations during the protected industrial action.

Acting Assistant Commissioner Terry Price says extra resources have been brought in, but travellers should expect delays.

"We've been working very closely with Sydney Airport's Corporation and with the airlines, and the airlines and the airports have been very proactive in support," he said.

"They've been SMSing their clients and also emailing their clients so the travelling public should be fully aware of the intended action."

A Department of Immigration and Border Protection spokeswoman said the department was working with its partner agencies, airport owners and airlines to minimise the impact on the travellers and on cargo and mail operations.