Hi Mina,
Ergon Energy are the nominated power authority for Saibai Island and are responsible for maintenance and upkeep of the electrical infrastructure. They are also the only body able to authorise or perform major upgrades, high-voltage (HV) or non-routine maintenance activities. They do not have engineers/technicians on the island and have to travel to/from the mainland for any works pertaining to these tasks.
Due to strict electrical safety and AS3000 requirements, unqualified or unskilled person(s) anywhere in Australia are unable to perform any electrical works.
For minor maintenance activities however, the Torres Strait communities will typically have someone who is suitably qualified and experienced in dealing with routine tasks. These are locals, are based on their island communities and work as part time resources.
Hope that helps.
Cheers,
Anthony