Yes, you can do deep work late at night. The elephant in the room question is - "what are you doing during the time that is allocated for work?" I think deep-

Yes, you can do deep work late at night. The elephant in the room question is - "what are you doing during the time that is allocated for work?" I think deep-work is then a secondary thing. The person needs to solve other more important problems first. 1) are you over-commiting? 2) Should you be more assertive with taking up more work? 3) Are you able to set expectations of people that wait for your work and then also communicate when there are delays? 4) Do you have problems delegating work? 5)...