Boeing Space Exploration, Houston, gave notice that it will cut 510 more employees as the winding down of the space shuttle program continues.

Boeing on June 3 gave 60-day advance layoff notices to 260 employees in Houston, 150 at the Kennedy Space Center, Fla., and 100 at its Huntington Beach, Calif., facility, the company said in a statement.

โ€œThis by far is our largest planned reduction,โ€ said Boeing spokesman Ed Memi.

If Space Shuttle Atlantis launches July 8 as planned, the 510 Boeing employees who got notice will work their last day Aug. 5.

The layoffs announced June 3 are more than double the 200 employees that Boeing has already let go because of the impending end of space shuttle operations.

โ€œWe hope that the next generation exploration launch system will serve to mitigate some of these losses,โ€ Brewster Shaw, Boeing Space Exploration vice president and general manager, said in a statement.

Boeing is one of the main subcontractors to United Space Alliance, the primary contractor for space shuttle operations. USA is a joint venture between Boeing Co., Chicago, and Lockheed Martin of Bethesda, Md. USA has said it will lay off 2,900 employees after the last shuttle flight.