Admin people. Often the most senior ones get the title "Personal Assistant (to senior person job title)" but not always. They're lead bureaucrats, and tracking things that need to be done and ensuring they get done, either by doing them themselves or assigning them to reliable underlings is the purpose of their role.
Corporations are often not very good at putting the right people in these roles but good ones are invaluable. Since the Marvel Universe is everywhere, Pepper Potts is the archetype in that setting to give you an idea of why you'd need people like this. Tony Stark would be "too busy" to renew the certificates, but Pepper would make sure it gets done.