There are a crew of engineers maintaining the satellite's position and operation while another team of scientists operate the telescope, review proposals, and s

There are a crew of engineers maintaining the satellite's position and operation while another team of scientists operate the telescope, review proposals, and schedule science time. Time also has to be scheduled for the TDRSS ground stations for data downloads. NASA is not the majority user of that system so there isn't a lot of time available. The data then needs to be adjusted and translated into something that can be given to scientists. There is an entire institute, the STScI, that manages missions for Hubble and will someday do the same for JWST and WFIRST. I'm sure there are at least a few dozen engineers and scientists that keep Hubble operational and busy. http://hubblesite.org/the_telescope/team_hubble/ http://hubblesite.org/the_telescope/team_hubble/