South Australian shipbuilders have called on the state and federal governments to guarantee the future of 700 submarine maintenance jobs at ASC.
Opposition leader Peter Malinauskas joined workers for a day shift and an afternoon shift rally at Osborne shipyards, north of Adelaide.
Peter Bauer, convenor of the South Australian branch of the Australian Shipbuilding Federation of Unions, said ASC had made 400 workers redundant since 2017 with more jobs in jeopardy in coming months.
"A continuous pipeline of work is needed to avoid another valley of death prior to the submarine build," he said.
"The sustainment work is critical in ensuring we have the skilled workers here in South Australia to deliver these projects.
"It just makes sense to keep this work here in South Australia."
Mr Bauer said the Future Submarines and Future Frigates would be built in South Australia, but the industry would face a serious challenge if current workers lose their jobs in the interim.
"It's time for the federal government to stop playing games with South Australian jobs and for our state parliament to step up to secure these jobs," he said.
Australian Associated Press