Admins are usually charged with installing, supporting, and maintaining servers or other computer systems, and planning for and responding to service outages and other problems. Other duties may include scripting or light programming, project management for systems-related projects.
Level 1 support – Filters Help Desk calls and provides basic support and troubleshooting, such as password resets, printer configurations, break/fix instructions, ticket routing and escalation to Level 2 and Level 3 support.
Level 2 support handles break/fix, configuration issues, troubleshooting, software installations, hardware repair (including in-house repair or coordinating services.
Tier III (or Level 3 is the highest level of support in a three-tiered technical support model responsible for handling the most difficult or advanced problems.
A network administrator is the person designated in an organization whose responsibility includes maintaining computer infrastructures with emphasis on networking.
Responsible for finding customers who would purchase the company's products. A sales consultant often has to meet with clients, both in and out of the office; usually they will be assigned a certain territory in which they will travel.