This is a Sources Sought notice for planning purposes only and is not a solicitation. The requirement is for maintenance, annual system revalidation, and technical support of an existing Rees Scientific Environmental Temperature Monitoring System for 1,200 inputs across 7 nodes. The estimated period of performance is from July 1, 2026, to June 30, 2031, structured as a base year with four one-year options. Interested vendors must submit a capability statement demonstrating their ability to service this specific system, including access to proprietary software and qualified personnel. Responses will be used to inform the government's acquisition strategy.