Please note: This is a Sole Source Notification. Siemens; The requirements for Research 1 building digital twin are threefold: 1) The vendor would use a common software engine to build a 3-D model for our R1 building; 2) Connect and configure the connections between the digital twin and the building automation system and between the digital twin and the R1 microgrid to be built by UCF and Duke Energy. In essence, the desired digital twin is one that fully addresses the R1 building needs, that is, a grid-interactive smart building. The existing building automation system that operates the Research 1 building is a Siemens system, and Siemens is also providing their microgrid controllers and software to the R1 microgrid project. As such Siemens is uniquely qualified to provide integration services between their existing software and hardware systems, and the digital twin. In addition, the Siemens digital twin layers available to be included are closely tied to systems and solutions that exist in a building and can include any building automation systems/HVAC, security, vertical lift, electrical, plumbing, fire alarm, lighting, access control, parking systems, and many more. In summary, the Siemens' digital twin has the aforementioned features that uniquely satisfy our requirements.