Management at Dublin and Cork airports are looking to cut up to one-thousand jobs, according to SIPTU.
The trade union says workers were told today that the cuts are necessary as lower passenger numbers are expected in 2021.
It is now calling for urgent discussions with the Dublin Airport Authority to ensure any redundancies are strictly voluntary.
SIPTU Sector Organiser Neil McGowan says staff are very concerned:
"People are very worried.
"I don't think anybody is blind to the difficulties that the entire aviation industry finds themselves in."