Item 8.01 Other Events.

On September 8, 2009, Mercury Computer Systems, Inc. (the "Company") issued a press release announcing the appointment of Rear Admiral (retired) J. Michael Johnson, the former President and Chief Executive Officer of Recon Optical, Inc., as President of the Company's Mercury Federal Systems, Inc. ("MFS") subsidiary. Mr. Johnson, a current member of the MFS Board of Directors, will assume the role of President on an interim basis as the Company searches for a replacement for Terry Ryan, MFS's former President. A copy of the press release announcing the appointment of Mr. Johnson and the departure of Mr. Ryan is attached hereto as Exhibit 99.1 and incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description
99.1 Press Release issued by Mercury Computer Systems, Inc. on September 8, 2009.

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