SANTA ANA, Calif. — May 21, 2007 — MSC.Software Corp. (NASDAQ: MSCS), the global provider of enterprise simulation solutions and services, today announced that Swales Aerospace successfully utilized MSC Nastran and MSC Adams to eliminate the need for system level deployment testing in the design and development of the NASA satellite constellation THEMIS (Time History of Events and Macroscale Interactions during Substorms) Probe Bus & Probe Carrier.

MSC.Software solutions were used extensively, playing a critical role in the development and validation of THEMIS. This historic launch marked the first ever simultaneous deployment of five NASA satellites from a single launch vehicle.

“MSC.Software modeling tools were used extensively to validate the Probe Bus deployment clearances analysis,” said Michael Cully, THEMIS program manager for Swales Aerospace. “These tools were a critical element in solving a difficult problem and allowing Swales to optimize design. These tools served as the only means of validating that the design met all critical clearance requirements, as a system deployment test of all the Probes on the Probe carrier was not possible.”

NASA MIDEX Mission THEMIS provides answers to critical questions about the origin and phenomenology of solar and Earth magnetospheric interaction, the resultant electrical substorms, effects on space weather, disruptions in ground power grids, and communications. These affect the operation of other space satellites and the lives of humans in the sub-auroral regions of earth.

“The THEMIS launch is a perfect example of MSC.Software solutions allowing for accuracy of design in mission-critical environments,” said Bill Weyand, chief executive officer of MSC.Software. “We are excited that our solutions continually play such a crucial role in historic space events.”

About Swales Aerospace

Established in 1978, Swales Aerospace is an employee-owned company headquartered in Beltsville, MD that offers a full range of engineering capability to the aerospace industry – services for study, design, development, fabrication, integration, testing, verification and operation of space flight, as well as ground system hardware and software. With revenues of $201 million 1n 2006, the company employs more than 850 with branch offices in CA and VA. Additional company information is available at www.swales.com.

About MSC.Software Corporation

MSC.Software (NASDAQ: MSCS) is the global leader of enterprise simulation solutions, that help companies make money, save time and reduce costs associated with designing and testing manufactured products. MSC.Software works with thousands of companies in hundreds of industries to develop better products faster by utilizing information technology, software, services and systems. MSC.Software employs more than 1100 people in 23 countries. For additional information about MSC.Software's products and services, please visit www.mscsoftware.com.

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Safe Harbor Language

This press release contains forward-looking statements, including all statements relating to the features, benefits, capabilities and performance of MSC.Software products. These statements are subject to risks and uncertainties that could cause actual results to be materially different than expectations. Such risks and uncertainties include, but are not limited to, changes in technology, the end-user computing and analysis environment, implementation and support that meet evolving customer requirements, general industry trends and the impact of competitive products.

Furthermore, information provided herein, which is not historical in nature, are forward-looking statements pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. All such forward-looking statements are based largely on management’s expectations and are subject to and qualified by risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements. The Company undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the Company’s expectations.

The MSC.Software Corporate Logo, MSC Nastran and MSC Adams are trademarks or registered trademarks of MSC.Software Corporation in the USA and/or other countries. All other trademarks belong to their respective owners. Nastran is a registered trademark of NASA.

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