The Department of Commerce, specifically the National Institute of Standards and Technology (NIST), is seeking a sole source contractor for the Rees Monitoring/Maintenance Service to support its Biosystems and Biomaterials Division. The procurement involves a one-year service agreement with four option periods for the maintenance, calibration, and support of the Rees Scientific Environmental Monitoring System currently in use in NIST laboratories. This service is critical for ensuring the reliability and accuracy of temperature monitoring, which is essential for laboratory operations. Interested parties capable of fulfilling these requirements are invited to submit responses by 1:00 AM EST on June 13, 2025, with inquiries directed to Erik Frycklund at erik.frycklund@nist.gov.