I'm curious to hear how this turned out for you. I have a similar situation. This department was restructured in February. I was added to the managerial staff and the previous two managers are still involved. They had conversations with this employee about falling asleep at his desk prior to my involvement. I have some documentation of those conversations.
Since I’ve been around, there have been three separate instances of him falling asleep that I know of. There apparently has been others, but I have not been informed in order to document or discuss. The first time that I heard of him falling asleep, I had a conversation with him. He said that yes, it’s true. He had a terrible night the previous night, was fighting sleep all day long and did doze off at his desk. I told him that I couldn’t have him doing that and that in the future, he should let me know and take a walk, step outside or get something to drink (like water or coffee). I also asked if there were environmental changes I could make for him; he offered none. He then said that he sometimes has trouble sleeping at night and that this was not the first time he’s fallen asleep at his desk. He apologized and said he understood what I was saying.
The next time, he fell asleep in my office! Not three feet away from me. He was working on one of the other computers in my room. I woke him up. He offered no real explanation or apology. He finished his work and left the office.
Now, after this second time, I could have kicked my rear for not immediately writing him up. I felt that I had let too much time go by and decided that if it happened again, action would be taken. Well, it happened today. This time it was at his desk. I stopped to make a copy and there he was, snoozing away. I said his name a few times to wake him.
I need to write him up. What kind of terms do I set?
Any help would be appreciated.