delegator       
noun [ C ] uk/ˈdel.ɪ.ɡeɪ.tər/ us/ˈdel.ə.ɡeɪ.t̬ɚ/
 (将部分工作、职责等分派给别人去完成的)委派人,委托人
someone who delegates (= gives) part of their job, duties, etc. to someone else to do for them
  I'm trying to cut back my 60- hour working week and I've learned to be a better delegator. 我在试图减少自己每周六十小时的工作量,由此学会更有效地把工作委派给别人去做。 
 As a president, he seems likely to be more of a figurehead and delegator.  作为总统,他似乎更像是一个傀儡和代表。 
 - More examples
 - His chief of staff's most important skills are as a delegator and disciplinarian.
 - I'm an easy guy to work for. I'm a delegator.
 - Some people would say I'm a control freak but I'd say I'm a pretty good delegator.
 - She is regarded as a skilled delegator and motivator.
 - Do you see him as a detail guy or is he more of a delegator?