Thanks! I had a quick look at your existing Function code just now and it seems you’re almost there 
The one thing it was missing was the json key that’s part of the n8n data structure and a return value. So instead of items.name_Of_Employee you’d need to use something like item.json.name_Of_Employee if you want to read the name_Of_Employee field.
I’ve also added a return statement to return the result. This is the updated workflow:
Function node output:
Hope this helps!