A statement from the prime minister's office on Sunday said that the heads of the police force and fire brigade had been replaced by their deputies, BBC reported.
It comes two days after the resignation of the civil protection minister.
The government has been strongly criticised over its response to the wildfires, which claimed the lives of at least 90 people.
Fanned by strong winds, the flames spread through the Attica Peninsula, with the resort town of Mati among the worst-affected areas.
Eyewitnesses said that hundreds of people were forced into the sea as the fires approached, while others were trapped by the flames.
In one area, the bodies of 26 adults and children who appeared to have died hugging each other were found.
The government has said the fires were started by arsonists and blamed illegal construction for blocking escape routes.
However, a catalogue of errors in the authorities' handing of the fires emerged earlier this week.
According to one senior expert, police set up diversions that sent drivers into the path of the fire, while a separate study found that authorities did not raise an alarm to allow residents and tourists to escape.
The families of a couple in their 70s who were killed in the fires are suing police, fire, civil defence and regional leaders over their deaths.
Nikos Toskas, the minister responsible for both police and fire services, became the first person to leave the government since the fires began when he stepped down from his role last Friday.
But he said that no "grave operational mistakes" had been made by the services.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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