DISA/DITCO, intends to issue a contract  for the acquisition of ArcSight Software Maintenance Renewal. The software being maintained is proprietary and protected by copyright laws. No third party maintenance is authorized. Period of performance is date of award through 29 Apr 2012. The statutory authority for other than full and open competition is 10 USC 2304( c)(1), only one responsible source and no other supplies or services will satisfy agency requirements. Companies who can provide the above listed software maintenance renewal must complete the attached solicitation, HC1028-11-T-0273, and return it via email to [email protected] by 11:59 P.M. (Central Time) on 20 June 2011. The resultant contract will be a firm fixed price purchase order. The NAICS code is 511210 for this procurement.