According to Wes Penre, the job is taken in turn by En-ki and Marduk of the Wes Penre papers literature.
Wes back’s everything up with bibliographic evidence. Just leaving this here for those that have any doubts! The names of Lucifer, En-Ki are actually job titles and are filled by different beings over long periods of time. Should you want to know more I suggest researching yourself.
I have supplied links to other writers on my blog over the years to start people off in a search should they be so inclined to do so. http://alexfulfordclairvoyantmedium.blogspot.com/ My old blog has plenty of reading, but I did not know how to add tags to the articles, so it is best to click the first month and just run through the items.