Orbital to Present at Deutsche Bank 2012 Global Industrials and Basic Materials Conference on June 14

(Dulles, VA 11 June 2012) – 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 Deutsche Bank 2012 Global Industrials and Basic Materials Conference to be held in Chicago on June 14, 2012. Mr. Pierce’s presentation is scheduled to begin at 12:20 p.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