ATK Wins Three-Year Initial $15 Million Services Contract With NASA’s Jet Propulsion Laboratory

ATK’s Pasadena Site to Provide Mechanical and Thermal Engineering Support Services

ATK Acquisition and Successful Integration of Swales Aerospace Producing Results

Alliant Techsystems (NYSE: ATK) announced today that it has been awarded an initial three-year $15 million services contract by NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. Under the terms of the agreement, ATK will provide mechanical and thermal engineering support services to JPL for an initial three years, with two one-year options.

Through its acquisition of Swales Aerospace, ATK has supported JPL since 1997. The company has provided mechanical and thermal engineering services support to NASA JPL on programs such as the Mars Science Laboratory (MSL), the Moon Mineralogy Mapper, the Urey Instrument, the Orion Program, and the Planck, Juno, and Aquarius missions. The ATK-led team also includes subcontractors ATA Engineering, Jackson & Tull, SGT Inc., and West Wind Engineering.

“We look forward to building on our long term relationship with NASA’s Jet Propulsion Laboratory team and are excited about our continued partnership with them on this important services contract,” stated Mike Cerneck, Vice President and General Manager of the Space Division. “This is an important win for ATK and we are very proud of our team’s accomplishment.”

ATK is an advanced weapon and space systems company with annual revenues in excess of $4.1 billion that employs more than 16,500 people in 21 states. News and information can be found on the Internet at http://www.atk.com.

Certain information discussed in this press release constitutes forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Although ATK believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be achieved. Forward-looking information is subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Among those factors are: changes in governmental spending, budgetary policies and product sourcing strategies; the company’s competitive environment; the terms and timing of awards and contracts; and economic conditions. ATK undertakes no obligation to update any forward-looking statements. For further information on factors that could impact ATK, and statements contained herein, please refer to ATK’s most recent Annual Report on Form 10-K and any subsequent quarterly reports on Form 10-Q and current reports on Form 8-K filed with the U.S. Securities and Exchange Commission.