The Department of Homeland Security, specifically the United States Secret Service (USSS), intends to award a sole source contract to D-Fend Solutions AD, Inc. for the maintenance of EnforceAir Systems hardware and software. This contract is crucial for ensuring the continued operational support of proprietary counter-unmanned aerial systems (cUAS) technology, which is essential for the USSS's mission. The decision to proceed without competitive bidding is justified under FAR regulations due to the unique qualifications of D-Fend Solutions, which is the only provider capable of meeting the specific maintenance requirements of the existing systems. Interested parties may direct questions to Yu-Jin Kim at yu-jin.kim@usss.dhs.gov or Sarah Diamond at sarah.diamond@usss.dhs.gov by 7:00 AM EST on July 15, 2025.