Answer:
Greg's career is a resident assistant.
Step-by-step explanation:
Resident assistant is one of the on-campus jobs. The roles played by a resident assistant includes monitoring the security of the rooms and giving support to college students by organizing activities, conducting weekly/biweekly floor meeting, handling complaint or request from residents, mediating conflict between floor mates etc.
A resident assistant can get paid by hour or get free/discount accommodation fee in the college. Besides, a resident assistant is also regarded as a role model to other college residents.