If you are out of work, take a chance.
If you have a job, keep it.
Shift Manager is the worst job in the company.
Could not have said it better.
That job will be career suicide. I was a shift mgr in PHL (albeit in a non-traditional role) for part of my career. Other than the hullabaloo of the day I left the company, working as a shift mgr in PHL was the nadir of my time at US. Luckily for me, I found a way out before the agents lynched me, my co-workers figured out a way to stuff me in a body bag or my bosses decided I was no longer effective.
It was impossible to be effective in that job. No support or cooperation from managment (other than lip service), undermining and scheming co-workers fearful for their own jobs, and a population of agents who clearly understood that the tail wags the dog in that place.