chief, head, leader

serving in an additional post concurrently

hold an additional post concurrently

to assume a role

to instruct, to teach

professor / instruction, teaching

university department

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend