Lockheed Martin Systems Integration, Owego, N.Y., is being awarded a $500,000,000 modification to a previously awarded cost-plus-award-fee contract (N00019-05-C-0030) to provide additional funds for engineering development efforts in support of the System Development and Demonstration (SDD) of the VH-71 Presidential Helicopter.>> Work will be performed in Patuxent River, Md. (28 percent); Owego, N.Y. (26 percent); Yeovil, United Kingdom (20 percent); Cascina Costa, Italy (15 percent); Rolling Meadows, Ill. (3 percent); Lynn, Mass (3 percent); Clifton, N.J. (2 percent); Denton, Texas (1 percent); Grand Rapids, Mich. (1 percent); and Rancho Santa Margarita, Calif. (1 percent), and is expected to be completed in December 2014. Contract funds will not expire at the end of the current fiscal year.>> The Naval Air Systems Command is the contracting activity.>> -ends->