The CDC intends to modify an existing purchase order on a sole source basis to add lab instruments to a maintenance service agreement with Cepheid, located in Sunnyvale, CA. Only Cepheid, as the original manufacturer of the GeneXpert instruments, can provide the required proprietary parts and calibration protocols. No competitive solicitation will be posted, but responsible sources may submit a capability statement to the Contracting Officer by the closing date. Performance of services will occur at Cepheid’s location in Sunnyvale, CA. No budget amount or submission timeline is specified.