"Spitzer likely can operate through 2018, Helou said. To get there, the project will have to trim its full-time staff, discontinue some engineering support services and cease efforts to make spacecraft operations more efficient, Helou said. There are about 45 full-timers on Spitzer now, including 27 at the Spitzer Science Center. The others are at NASA's Jet Propulsion Laboratory in Pasadena, which is run by Caltech, and Lockheed Martin Space Systems of Sunnyvale, California, which built the telescope."
Shutdown for Spitzer and MaxWISE?, earlier post