The Montara Venture FPSO is moored in the Timor Sea some 650 kilometres offshore west of Darwin, in the Northern Territory.
When the Border Force crew member suffered a health incident on the Cape Sorell patrol vessel, Jadestone's rig workers were the first responders and brough the ABF officer onboard the FPSO for urgent treatment.
The exact nature of the health incident is unknown, but Energy News understands the officer was immediately flown from the Jadestone facility by helicopter to Darwin for urgent medical treatment.
"It was pretty serious. He was pretty unwell," one rig worker told Energy News.
In total about a dozen Jadestone rig workers were involved in the rescue operation.
The Maritime Border Command and Australian Border Force wrote to the rig workers to thank them for their "excellent, professional and timely support" in assisting with the medevac and rescue.
Rear admiral of the Royal Australian Navy Lee Goddard said in a letter to Jadestone management the combined rescue effort was a "shining example" of cooperation between the oil and gas industry and the defense force.
"The commanding officer of Cape Sorell could not speak highly enough of professionalism, calmness and experience demonstrated by the oil and gas crew," Goddard said.