I have an Australian Driver’s License. Would this be sufficient without my having to apply for an international one?

Yes, so long as the driver produces a valid driving license from their country, it will be valid. However, kindly note the following requirements for being able to drive our rental cars:The driver’s license must be at least 3 years old according to the driver’s age and driving license issue date.
The driver’s license must be written in English or Latin alphabet characters.
Minimum driver’s age is 25 years. If a driver is between 21 and 24 years old, the driver must pay a young driver surcharge of EUR 10.00 per day.
If the driver is between 72-75 years of age, and holds a valid driving license, the driver must pay a senior driver surcharge of EUR 5.00 per day.