Defence Department staff are maintaining their rage over the Federal Government’s job cuts and hardline bargaining stance.

Union leaders and Labor defence spokesman Stephen Conroy addressed a crowd outside the Defence's science and technology complex in Melbourne this week.

Action is planned across the country in the run-up to the election, focusing on Coalition marginal seats like Hindmarsh in South Australia, Herbert in Queensland and Eden-Monaro in NSW.

The public servants' outrage is two-pronged; as with the rest of the Australian Public Service, Defence staff are angry at the stone-walling bargaining processes that have seen two years of bitter workplace stalemates in bureaucratic bargaining.

Meanwhile, Defence technical staff say military scientific knowledge has been systemically eroded in recent years by deep cuts to funding and jobs.

Senator Conroy told the gathered members of the Australian Manufacturing Workers Union, the Community and Public Sector Union and Professionals Australia, they must continue to stand against the attacks on their conditions and pay.

“All of you have been involved in voting down Defence Department EBAs not once but twice,” Conroy told the crowd.

“The Shorten Labor government will get this issue resolved, we will not continually try to force and attack conditions and pay.

“We've got a government that has slashed $120 million from this organisation ... and I understand this work that is vital to our national security, vital to research to the country's innovation policies.

Matt Harris, a spokesperson for Professionals Australia, said; “Innovation is more than an election slogan”.