DULLES, Va., June 6 /PRNewswire/ -- Orbital Sciences Corporation (NYSE: ORB) announced today that Mr. Robert D. Strain has been appointed Executive Vice President and General Manager of the company's Space Systems Group (SSG). Previously the head of Orbital's Electronics and Sensor Systems Group (ESSG) since 1996, Mr. Strain has been with Orbital and a predecessor company for 12 years, earlier serving in key finance and manufacturing positions.

The company also announced that Mr. James R. Thompson, Orbital's President and Chief Operating Officer, will serve as acting head of ESSG until a permanent replacement is selected. In this capacity, he will be assisted by Mr. Richard W. Sherman, currently Senior Vice President and Deputy General Manager of ESSG.

"Rob Strain has consistently demonstrated strong leadership and keen business judgement during his career with Orbital, including running one of our most profitable business units over the past five years. I am very confident that he and his management team at SSG will continue our excellent track record of satellite product reliability and mission success while also restoring the group to solid profitability," said Mr. David W. Thompson, Orbital's Chairman and Chief Executive Officer.

Orbital's Space Systems Group designs, manufactures and supports the operation of low-orbit and geosynchronous orbit satellites and related spacecraft systems. During the last five years, SSG has successfully developed, built, tested and deployed 46 satellites; the group currently has 15 additional satellites under design or in production. SSG also provides space-related technical services to NASA, the Department of Defense, and other U.S. Government agencies. SSG currently employs approximately 1,000 people and generated revenues of over $200 million in 2000.

Orbital is one of the world's leading manufacturers of low-cost space systems, including satellites, launch vehicles and electronics and sensor systems. Orbital is also involved with satellite-based networks that provide wireless data communications and high-resolution Earth imagery to customers all around the world.

More information about Orbital can be found at http://www.orbital.com .

CONTACT: Barron Beneski, 703-406-5528 or beneski.barron@orbital.com; or
Investors: Tim Perrott, 703-406-5997 or perrott.tim@orbital.com, both of
Orbital Sciences Corporation.
                    MAKE YOUR OPINION COUNT -  Click Here
               http://tbutton.prnewswire.com/prn/11690X49238751

SOURCE Orbital Sciences Corporation

CONTACT: Barron Beneski, 703-406-5528 or beneski.barron@orbital.com; or Investors: Tim Perrott, 703-406-5997 or perrott.tim@orbital.com, both of Orbital Sciences Corporation/