Lockheed Martin plans to move 560 salaried jobs from Marietta to its Fort Worth, Texas-based Aeronautics division by March, the Atlanta Journal-Constitution, Dallas Morning News and Fort Worth Star-Telegram report.

Marietta employees affected include engineers, schedulers and persons in administrative positions. They have until Jan. 7 to decide if they plan to move.

The employee group affected has been building the F-22 Raptor, and now they’ll be supporting the aircraft, Dallas News reports.

Lockheed Martin continues to produce F-16 Fighting Falcons at a low level from the Fort Worth plant. That work has evolved into a support business that includes making modifications to and updating the F-16, Dallas News and Fort Worth Star-Telegram report. So it makes sense to consolidate all support work to Fort Worth.

While the F-22 Raptor was assembled in Marietta, one-third of the construction was completed in Fort Worth. In all, Lockheed Martin delivered 195 F-22s to the Air Force beginning in 1997, with eight Raptors used as test aircraft. In May 2012, the final F-22 Raptor was delivered to the U.S. Air Force.

The 40 F-22 employees in Marietta who will remain are set to focus on canopy work and other specialized tasks, the AJC reports