The NIH Office of the Director, Office of Acquisitions, intends to issue a non-competitive firm-fixed-price purchase order to ThermoFisher Scientific (FEI Company) for a one-year maintenance and service agreement covering one ThermoFisher Scientific Talos L120C Transmission Electron Microscope. The award is sole-source because ThermoFisher is the OEM and the only source able to provide factory-trained authorized service engineers, proprietary diagnostic/control software, firmware, and OEM-specification parts needed to maintain the instrument within manufacturer specifications. The requirement falls under NAICS 811210, Electronic and Precision Equipment Repair and Maintenance, with a $34 million small business size standard, and is not set aside for small business. The action is conducted under streamlined commercial-item procedures and is not expected to exceed the simplified acquisition threshold. The applicable solicitation clauses are those in effect through Federal Acquisition Circular 2026-01, effective 03/13/2026.