This post-award notice publishes a Limited Sources Justification for a GSA MAS task order awarded to Siemens Industry, Inc. The USDA Agricultural Research Service requires proprietary Siemens Desigo CC Building Automation System and mechanical preventive maintenance services at the Southeastern Fruit and Tree Nut Research Laboratory in Byron, Georgia. Siemens is the OEM and the only source with legal and technical authority to provide Desigo CC software updates, diagnostics, calibration tools, and BAS network services. The justification is provided under FAR 8.405-6(c)(2), with proprietary technical and sensitive facility information removed from the public posting. This indicates a sole-source award to Siemens rather than an open competitive opportunity.