Sierra Nevada Corp., Sparks, Nev., is being awarded a $49,832,778 modification to previously awarded contract (N00024-09-C-6306) to procure 587 dismounted Joint Counter Radio-Controlled Improvised Explosive Device Electronic Warfare (JCREW) systems. Dismounted JCREW systems are electronic jammers designed to prevent the initiation of Radio-Controlled Improvised Explosive Devices. This contract is for the procurement and support of JCREW systems, to be used by forces in each of the military services of the Central Command area of responsibility. The Navy manages the JCREW program for Office of the Secretary of Defense's Joint Improvised Explosive Device Defeat Organization. Work will be performed in Sparks, Nev. (90 percent), and Rancho Cordova, Calif. (10 percent), and is expected to be completed by July 2011. Contract funds will not expire at the end of the fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity.