What is a civil service job?

Answer 1

A civil service job is merely a job working directly for the government. All government employees are considered "public servants".

Answer 2

Mostly people use that to refer to positions within the public sector or government (city, state, federal). A few common things that come to mind include Police or Fire Department, Education, but also include things like HR or administrative/staff positions within government. Your local city human resources or jobs page is one place to find these as well as the USAjobs site.