@scottalanmiller said:
A systems person: works on operating systems, specifically servers. Specialties within systems would be Windows, Linux, Solaris, AIX, FreeBSD, etc.
A network person: works on networking gear like routings and switches. Specialties within networking would be Cisco, Juniper, Palo Alto, etc.
An admin: runs operational systems. They manage the live running systems. They are focused on availability and need an operational mindset.
An engineer: designs and builds systems for operations. They don't manage running systems but provide them to admins. They are focused on productivity and need a design mindset.
Unless you work for a consulting company like I do and they give you a big title and make you do a bunch of everything lol.