duty, responsibility (incl. supervision of staff), liability...

resignation (from a position)

assumption (of office), taking up (a post), inauguration...

term of office

duty, function, office...

to leave (a matter, decision, etc. to someone)...

person in charge, senior staff, manager...

obligation, duty, charge...

optional, voluntary, arbitrary...

appointment, nomination, ordination...

moving to a different location to start a new job, (proceeding to) new appointment

being in charge of (esp. a class or subject), taking charge of, class teacher...

successor

standing, regular, permanent

irresponsibility

entrusting, charge, delegation...

dismissal (from a post), discharge, removal

being in office

trust, confidence, credence

retirement, resignation, stepping down

breach of trust, malfeasance, malpractice...

non-confidence, lack of confidence

noninterference, leaving something to take its own course, giving someone a free hand with something

to entrust (to someone), to leave (in someone's hands)

person in charge (including a supervisory role for other staff), person responsible for ..., responsible party...

initial salary

full-time service

remaining in office, staying in office, remaining at one's post

serving concurrently as, holding the additional post of

reappointment