2- He/She is Super-Aggressive:
If your feline has been acting aggressive all of a sudden with no apparent reason, it could be a definite sign of separation anxiety.
In order to deal with this issue, you need to try and discover the actual cause & fix the same. Boredom, when you are away, can be the reason for such aggressive behavior.
In order to aid your kitty, give him/her some attention, take them out on a walk, and try to tire them out before you head out to the office.