The U.S. Secret Service intends to negotiate on a sole source basis with Foster & Freeman USA Inc., 46030 Manekin Plaza, Suite 170, Sterling, VA  20166 to provide maintenance support on the following Foster & Freeman equipment: EDSA, VSC4C, VSC 5000 and VSC 6000 for a base period of 12 months plus (2) option year periods of 12 months each for a total of three (3) years beginning October 1, 2011.  The Government intends to solicit and negotiate with one source under the authority of FAR 6.302 - Circumstances permitting other than full and open competition.  This notice is neither a request for proposal nor a solicitation of offers. The determination of the Government not to open this requirement to full and open competition was made in accordance with FAR Part 6.302-1 and is solely at the discretion of the Government.  Entities may identify their interest and ability to meet this requirement via a written capability statement only.  All capability statements must be emailed no later than 15 business days after publication of this notice.  Any information received will be maintained for future Market Research requirements. No formal solicitation package is available.  The Government will not be responsible for any costs of preparation in response to this announcement.