The National Institute of Standards and Technology (NIST) intends to negotiate a sole source annual preventive maintenance contract with Malvern, Inc. for its existing Malvern Panalytical Epsilon 1 X-Ray Fluorescence Spectrometer, located in Gaithersburg, Maryland. The equipment is proprietary, and only Malvern-certified field service engineers can perform the required maintenance and repairs to ensure system functionality and continuity of research. The NAICS code is 811210 with a small business size standard of $34 million. Interested parties capable of meeting the requirements may submit a capability statement to the contracting officer. No solicitation package will be issued.