Waste management workers are set to strike again across Sydney and Canberra.

Cleanaway staff will hold a 24-hour strike on Tuesday in their campaign against longer shifts and a reduction of overtime rates.

Workers will be walking off the job, leaving bins uncollected in the City of Sydney, Randwick, Erskine Park and Silverwater.

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A strike is happening at the same time in Canberra, the latest of multiple strikes in NSW and the ACT.

Transport Workers' Union NSW/Queensland secretary Richard Olsen claimed workers are being "treated horrifically".

"Waste worker shortages have put enormous pressure on workers to work faster and longer, while Cleanaway's attempts to worsen conditions will only add to dangerous pressure on workers to rush and drive tired through suburban streets," Olsen said.

"Following four days of strike action at both City of Sydney and Erskine Park depots, workers have achieved some progress towards fairer agreements, but are still facing unfair and unsustainable attacks to their income and working hours."

After the previous strike, Cleanaway said it had made an amended offer.

"Cleanaway entered into bargaining with the TWU in good faith to ensure our employees receive the most fair and reasonable agreement," it said.

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