As far as I know you only need to pass probation in order to be represented by the union, not a certain level of seniority. Not sure why the union/twu failed this person when doing cancer treatment, but wow! I do say. I hope he is able to prevail in this fight.
www.yahoo.com
United Airlines technician with Stage 4 cancer fired during chemotherapy session, lawsuit says
Exclusive: ‘No one should have to choose between their health and their livelihood,’ a lawyer for 737 mechanic Hasan Syed told The Independent