Sierra Nevada Corporation Selects Argon ST, Inc. for $44.7 Million Payload Provider Contract under ORBCOMM Generation 2 Program

Argon ST, Inc. (NASDAQ:STST), announced today that Sierra Nevada Corporation (SNC) has selected Argon ST to develop and deliver the satellite payloads for the ORBCOMM Generation 2 (OG2) satellite constellation. The contract, valued at approximately $44.7 million, includes development and delivery of 18 payloads over a 30 month period of performance. The contract contains options for additional payloads that would add to the initial award value. Argon ST’s work will be performed primarily at its San Diego facility and the facilities of its development partners throughout California. "We are very pleased that Sierra Nevada Corporation has selected Argon ST for this important development,” stated Terry Collins, Chairman and Chief Executive Officer, Argon ST. "We have worked closely with ORBCOMM and MicroSat Systems for over two years, and more recently directly with SNC, to develop an efficient, powerful solution for ORBCOMM’s OG2 satellite constellation.” Argon ST’s OG2 payload development team includes ATK Space Systems of Goleta, CA, Aitech Defense Systems of Chatsworth, CA, and Aethercomm of San Marcos, CA. The payload team will design, develop, and deliver an enhanced communications payload designed to increase subscriber capacity by up to 12 times over the current ORBCOMM satellites. ORBCOMM customers will be able to transmit data over the OG2 satellites at greater speeds and send larger data packets using future modems. The OG2 satellites will be backward compatible so that existing subscriber communicators will function seamlessly with the OG2 satellites. In addition, all OG2 satellites will be designed with Automatic Identification System (AIS) payloads to receive and report transmissions from AIS-equipped maritime vessels. ORBCOMM intends to market this AIS data to U.S. and international coast guards and government agencies, as well as companies engaged in security or logistics businesses for tracking shipping activities or for other navigational purposes. "Argon ST’s approach brings an innovative architecture that extends our software defined radio capabilities into space. Combining the company’s in-depth knowledge of ORBCOMM operations, partners with extensive space heritage, and advanced communications systems expertise, we are committed to deliver a very capable, cost effective solution,” stated Jay Grove, Vice President, Network Systems, Argon ST. "We believe our selection for this award in the mainstream low-earth orbit payload market signals that opportunities in space are abundant for those driving an operationally responsive approach.” About Argon ST, Inc. Argon ST, Inc. designs, develops, and produces systems and sensors for the Command, Control, Communications, Computers, Combat Systems, Intelligence, Surveillance, and Reconnaissance (C5ISR) markets including SIGINT (Signals Intelligence), ESM (Electronic Support Measures), EW (Electronic Warfare), IO (Information Operations), imaging, and acoustic systems serving domestic and international markets. About Sierra Nevada Corporation (SNC) SNC is a world-class prime system integrator and electronic systems provider known for its rapid, innovative, and agile technology solutions. Over its 45 year history, SNC has a strong and proven track record of delivering leading-edge and cost-effective high technology Electronics, Avionics, and Communications systems and solutions to our customers. SNC employs an extremely talented workforce of over 1100 people, all of whom are dedicated to satisfying our customer’s needs. Our six different business area operate from over 30 locations in 20 states along with numerous customer support sites located throughout the world. Building on our success, SNC is expanding our tradition of excellence into the areas of Space, Telemedicine, nanotechnology, Energy, and Net-Centric Operations. Forward-Looking Statements Statements in this press release which are not historical facts are forward-looking statements under the provision of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are not guarantees of future performance and are based upon numerous assumptions about future conditions that could prove not to be accurate. Forward looking statements are subject to numerous risks and uncertainties, and our actual results could differ materially as a result of such risks and other factors. In addition to those risks specifically mentioned in the reports filed by the Company with the Securities and Exchange Commission (including the Company’s Form 10-K for the fiscal year ended September 30, 2007), such risks and uncertainties include, but are not limited to: the availability of U.S. and international government funding for the Company’s products and services; changes in the U.S. federal government procurement laws, regulations, policies and budgets (including changes to respond to budgetary constraints and cost-cutting initiatives); the number and type of contracts and task orders awarded to the Company; the exercise by the U.S. government of options to extend the Company’s contracts; the Company’s ability to retain contracts during any rebidding process; the timing of Congressional funding on the Company’s contracts; any government delay in award or termination of the Company’s contracts and programs; difficulties in developing and producing operationally advanced technology systems; the timing and customer acceptance of contract deliverables; the Company’s ability to attract and retain qualified personnel, including technical personnel and personnel with required security clearances; charges from any future impairment reviews; the future impact of any acquisitions or divestitures the Company may make; the competitive environment for defense and intelligence information technology products and services; general economic, business and political conditions domestically and internationally; and other factors affecting the Company’s business that are beyond its control. All of the forward-looking statements should be considered in light of these factors. Investors should not put undue reliance on any forward-looking statements. We undertake no obligation to update these forward-looking statements to reflect new information, future events or otherwise.