Workers at a major parcel delivery service have voted to strike, potentially dealing another blow to Australians already waiting longer periods for their online shopping due to virus lockdowns.

Some 90 per cent of StarTrack union members voted to take strike action if their employer did not meet their demands, the Transport Workers’ Union said.

The TWU says this made up 70 per cent of the total workforce, but StarTrack said it was barely a third.

The workers want StarTrack to guarantee labour hire workers will receive the same pay and conditions as regular employees.

They also want caps on the use of lower-paid external workers and want to be offered work before the company contracts it out.

Australians are already facing unusual wait times for deliveries, as Australia Post – which owns StarTrack – struggles under the pressure of a lockdown-induced online shopping blitz.

The postal service last week paused parcel collection services for online retailers for three days in NSW, Victoria and the ACT, which are all in lockdown.

StarTrack workers are not the only delivery and transport company workers considering strike action.

Some 4000 FedEx workers are also voting on potential strike action, with a result expected next Friday.

Employees at Linfox and Bevchain are also casting votes in protected action ballots.

Transport Workers’ Union National Secretary Michael Kaine said StarTrack was playing games with workers’ livelihoods.

“At the same time as the company floods yards with contractors with fewer rights, it refuses the crucial job security guarantees employees deserve,” Mr Kaine said on Friday.

“Workers have no choice but to fight for their jobs and they’ve sent that message through a strong vote for the right to go on strike.

“The ball is in StarTrack’s court and we implore the major transport operator to act responsibly.”

StarTrack said its final offer to the TWU – a 9 per cent pay rise over three years – was the best they could do, and rejected union fears of job insecurity.

“We are disappointed that the TWU is threatening this action during a time when the crucial supply of essential goods has never been more important,” StarTrack said in a statement.

“Less than one-third of StarTrack’s workforce voted to support this action.

“Any industrial action would have a significant impact on customers, particularly those in vulnerable regional communities requiring essential supplies such as medicines, protective equipment and vaccines.”

-AAP