This is a firm-fixed-price purchase order contract awarded by the Department of Health and Human Services National Institutes of Health Office of Logistics and Acquisition Operations to American Science & Engineering, Inc. (AS&E) to provide maintenance renewals for ION SCAN and GEMINI detection systems. The total potential value of the contract is $537,901.00. The contract does not have a set-aside designation. AS&E is a for-profit manufacturer of security inspection equipment such as x-ray, gamma-ray, and backscatter imaging systems, which the company has provided to various U.S. government agencies to support border security, force protection, and other security cooperation efforts. The maintenance services under this contract will enable the National Institutes of Health to sustain the operational capability of the ION SCAN and GEMINI technologies, which are likely used to detect radiological threats.