Exhibit 99.1
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, the undersigned hereby agree to the joint filing of a Statement on Schedule 13D (including any and all amendments thereto) with respect to the common stock, par value $0.01, of CPI International, Inc. and further agree that this Agreement be included as an exhibit thereto.
Dated as of December 6, 2010
| | CATALYST HOLDINGS, INC. |
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| | By: | /s/ Robert B. McKeon | |
| | | Name: Robert B. McKeon |
| | | Title: President |
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| | THE VERITAS CAPITAL FUND IV, L.P. |
| | BY: Veritas Capital Partners IV, L.L.C., its General Partner |
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| | By: | /s/ Robert B. McKeon | |
| | | Name: Robert B. McKeon |
| | | Title: Managing Member |
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| | VERITAS CAPITAL PARTNERS IV, L.L.C. |
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| | By: | /s/ Robert B. McKeon | |
| | | Name: Robert B. McKeon |
| | | Title: Managing Member |
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| | ROBERT B. MCKEON |
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| | By: | /s/ Robert B. McKeon | |
