The CFTC intends to modify an existing purchase order with Kastle Systems LLC for operations and maintenance of a physical security system at its Washington, DC office. The modification specifically covers monthly services for recent equipment upgrades to lobby turnstiles and enhanced door security. Kastle Systems LLC is identified as the sole proprietor of the system, with no other company permitted to provide these services. The government intends to procure this as a sole-source requirement under specific regulatory authority. While not a request for proposals, the government will consider written responses from capable sources received by a specified time for market research purposes only.