Roles in the Mainframe
Mainframe systems are designed to be used by large numbers of people. Most of those who interact with mainframes are end users— people who use the applications that are hosted on the system. However, because of the large number of end users, applications running on the system, and the sophistication and complexity of the system software that supports the users and applications, a variety of roles are needed to operate and support the system.
For Example:
In the IT field, these roles are referred to by a number of different titles, such as:
System programmers
System administrators
Application designers and programmers
System operators
Production control analysts