(Dulles, VA 6 May 2013) – Orbital Sciences Corporation (NYSE: ORB) one of the world’s leading space technology companies, announced today that Vice Chairman and Chief Financial Officer Garrett E. Pierce will make a presentation to investors and analysts at the Wells Fargo Securities 2013 Industrial and Construction Conference to be held in New York City on May 8, 2013. Mr. Pierce’s presentation is scheduled to begin at 8:55 a.m. (EDT).

Orbital will provide a link to the live audio webcast of Mr. Pierce’s presentation on the company’s web site at: http://www.orbital.com/Investor/.

About Orbital

Orbital develops and manufactures small- and medium-class rockets and space systems for commercial, military and civil government customers. The company’s primary products are satellites and launch vehicles, including low-Earth orbit, geosynchronous-Earth orbit and planetary exploration spacecraft for communications, remote sensing, scientific and defense missions; human-rated space systems for Earth-orbit, lunar and other missions; ground- and air-launched rockets that deliver satellites into orbit; and missile defense systems that are used as interceptor and target vehicles. Orbital also provides satellite subsystems and space-related technical services to U.S. Government agencies and laboratories.

More information about Orbital can be found at http://www.orbital.com. Follow the company on Twitter @OrbitalSciences

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Notes to editors:

Contact:
Barron Beneski (703) 406-5528
Public and Investor Relations
beneski.barron@orbital.com