2 moles on back getting excised, how long before returning to work as police officer?

Unfortunately, you are really going to need to ask your doctor how long you will need to be off work after removal of the two moles on your back.  I am not certain of the extent of the excisions and that could determine how much time you might need off.  If the moles are fairly small, it may just be a few days or a week or so.  If they are large, there could be more tension on the wounds and your doctor may want you to be off work a longer period of time.  I do not believe wearing the bullet proof vest should have too much affect on your healing, but stretching of the skin on the area could.  

It should take no more than a few days to return to normal work duties. If there is significant tension on the wound, you may need longer recovery times. Best, Dr. Karamanoukian Los Angeles

If these are done with shave excision/scoop you can go back to work the next day.  I suggest speaking to your physician.  If you use sutures you can go back to work but risk the sutures ripping, I would suggest waiting 3-5 days before if you do that.  Best, Dr. Emer.

Administrative light duty immediately. Heavy physical duty 2 weeks. I would suggest applying a tape (e.g. micropore tape) over the scar for 3 months or more. This will give it some additional strength. It is important to know that most scars in the back will stretch no more how careful you are.