A Monash University lecturer whose application for permanent residency was rejected because of his son's autism has been saved by an intervention from Assistant Immigration Minister Alex Hawke.

Dr Biswajit Banik and his GP wife, Dr Sarmin Sayeed - who moved to Australia from Bangladesh in 2007 - faced an uncertain future when an appeal for residency was denied in July because of their 12-year-old son Arkojeet's disability.

Dr Biswajit Banik and his wife Dr Sarmin Sayeed with their autistic son Arkojeet Banik. Credit:Chris Hopkins

On Thursday, Dr Banik was informed that the Assistant Immigration Minister had overturned the finding of the Administrative Appeals Tribunal for Migration and Refugees, following a concerted campaign by the family and their supporters.

"It's been such an emotional journey," the health academic said on Friday. "This has been our 10th year in Australia and the last 18 months we have been battling with our application."