The Department of Commerce, specifically the National Institute of Standards and Technology (NIST), intends to negotiate a sole-source contract with Bruker Scientific, LLC for maintenance services on a Fourier Transform Spectrometer (FTS) at its Boulder, Colorado facility. The contractor will be responsible for performing essential tasks such as HeNe laser alignment and interferometer re-alignment during a two-day onsite visit, ensuring the operational status of the FTS, and addressing any internal signal issues. This maintenance is crucial for obtaining accurate reflectance measurements that contribute to primary radiometric standards and solar irradiance measurements, supporting ongoing research in applied physics. Interested parties that can meet these requirements must submit their capabilities in writing to the primary contact, Lisa Stevens, at lisa.stevens@nist.gov by the specified deadline, with an estimated award date of June 30, 2025.