Its about doing your job well and with energy.
I personally lost 11 kg before applying for job as cc,before that i was size 14-16 aust. I am now at a healthy weight range for my height.
I CAN tell you being over weight gave me more health problems, made it harder to move around quickly and had me puffed out doing simple activities, while my healthy peers would b fine.
What I am saying is, sure listen to every one go for it and by all meanms dont b a vicyim to discrimination. But DO, do yourslef a favour and stick to your goal. Its great to have a job u want, but it's ideal to be healthy. You just have more energy.