The Regional Sponsored Migration Scheme (RSMS) subclass 187 allows employers in Tasmania to employ skilled migrants if a position cannot be filled by an Australia citizen or permanent resident.
If you cannot wait until the babies have fledged you may contact a licensed wildlife cooperator to help you find a solution. Chimney swifts are protected by the Migratory Bird Treaty Act and a federal permit is needed to remove birds and their nests during the nesting season.
The way you tell if you have birds or bats is by going outside at dusk and watching whether something comes out of your chimney or goes in. Bats are just getting ready to exit the chimney to forage for insects at dusk. Chimney swifts look a lot like flying cigars and will fly into the chimney to roost for the night.