Second Amendment to Alion Science and Technology Corporation Employee Ownership, Savings and Investment Plan

EXHIBIT 4.5

Second Amendment to

Alion Science and Technology Corporation
Employee Ownership, Savings and Investment Plan

     WHEREAS, Alion Science and Technology Corporation (the “Company”) maintains the Alion Science and Technology Corporation Employee Ownership, Savings and Investment Plan (the “Plan”) for the benefit of its employees and employees of other adopting employers, and was last amended and restated as of October 1, 2006; and

     WHEREAS, the Board of Directors of the Company, pursuant to Plan Section 15.1 of the Plan, has delegated authority to amend the Plan to the undersigned officer, provided he determines that the amendment would not materially increase costs of the Plan to the Company or any Adopting Employer.

     NOW, THEREFORE, pursuant to the powers of amendment reserved under Section 15.1 of the Plan, the Plan is hereby amended by the Company by the adoption of the following provisions:

     1. A new Supplement 5 is hereby added, effective as of October 1, 2007, as attached hereto.

     2. A new Exhibit A is hereby added, effective October 1, 2007, as attached hereto.

     IN WITNESS WHEREOF, Alion Science and Technology Corporation has caused this Second Amendment to the Plan to be executed on its behalf by the Chief Executive Officer as of the 24 ^th day of September, 2007.

Supplement No.5

Carmel Applied Technolog