If you enjoy normal blood pressure readings, avoid taking this job; avoid it like the plague.
I wasn't a religious person before working TAC. Then I developed serious blood pressure and anxiety issues. I denied I had a problem and kept working. Finally after a year or so, my wife begged me to go to the Doctor. They put me on enough medication to calm down a horse. I started counseling; and I went through all the responsibilities and typical schedule. They told me no wonder you are stressed, you are doing the work of several people.
I went to a different doctor who told me he had many other Cisco employees with same condition.
I say I wasn't religious, because someone up there was looking out for me; and I ended up leaving TAC for then working for the two best Managers at Cisco that I ever worked with.
My stress level went down 75% after leaving TAC. I was blessed to find something else.
Wishing all those working TAC good health. Take care of yourselves.