Presolicitation notice from the State Department of the United States is seeking Diesel Standby Power Generator Maintenance Services in Hermosillo, Sonora, Mexico. The purpose of this contract is to obtain professional services and cost proposals for annual preventive maintenance and servicing of the facility's generator units. The contract will be for a one-year period with four one-year options. All contractors must be registered in the SAM database prior to submitting a quotation.