Staffing Up Achievement
Hire a member of staff.
This achievement requires that you hire a staff member for the first time. There are three types of staff in the game: janitors, breeding specialists, and zoo keepers. Janitor is the cheapest to research and hire when starting a zoo. You will first need to build a janitor's office, found under Facilities. Once the office is built, go to Edit Facility>Staff>Hire. Here you can select someone to hire. Once you hire your first one, the achievement will unlock. This can be done in any game mode.