Word for someone who performs task [closed]

The most obvious one that comes to mind is data-entry clerk

A data entry clerk is a member of staff employed to enter or update data into a computer system.

(which admittedly is more than one word)


There are a lot of possibilities. The best ones I can think of to fill in "Disposal ____" are:

  • clerk
  • agent
  • specialist
  • worker
  • delegate