Hi,
If you are not A319 rated, you will have to go thru a full typre rating conversion and be subjected to a bond.
EZS are not on a fixed pattern roster, it is random with sometimes 7 days on 2 days off, you can also work 7 earlies in a row. All duties are 4 sector days.
EZS DOES have a seniority system unlike EZY UK.
Hope this helps.
On the upgrade side of things:
There are a few upgrades coming up, I think 2 upgrades will get to stay in GVA due to current EZS Captains relocating to BSL.
Other upgrades will be in BSL with no current system in place as to when and how a return to GVA will be possible.
Upgrading is on a seniority basis.
RGDS.