FIRST SUPPLEMENTAL INDENTUREFirst Supplemental Indenture • March 3rd, 2010 • Alion Science & Technology Corp • Services-engineering services • New York
This First Supplemental Indenture (this “Supplemental Indenture”) is dated as of February 26, 2010 and made by and among Alion-IPS Corporation, a Virginia corporation (“IPS”), Washington Consulting Government Services, Inc., a Virginia corporation (“WCGS”), Alion Canada (US) Corporation, a Delaware corporation (“ACUS” and, with WCGS and IPS, the “Additional Subsidiary Guarantors”), Alion Science and Technology Corporation, a Delaware corporation (the “Company”), and Wilmington Trust Company, (or its permitted successor), as trustee under the Indenture referred to below (the “Trustee”).
