Flies the spacecraft after launch and responds when something goes wrong.

Operations begins where the build ends. You monitor telemetry, plan and uplink command sequences, work anomalies against procedures written years earlier, and hand over to the next shift because spacecraft do not sleep.
Broad entry. Simulation and ground-segment internships are the usual way in.
No published projectionSpaceflight operations is not a published occupation. It is small, concentrated in a handful of agencies and companies, and the Handbook has no entry for it, so this profile quotes no figure rather than borrowing one from aerospace engineering.
Missions do not observe office hours and neither do anomalies. Much of the job is training for events that may never happen, and the ones that do happen arrive at three in the morning with a spacecraft that is not answering.