This is a combined synopsis/solicitation for commercial items prepared in accordance with the format in FAR Subpart 12.6, as supplemented with additional information included in this notice. This announcement constitutes the only solicitation; quotations are being requested and a written solicitation will not be issued.The Government intends on awarding a Firm-Fixed Price (FFP) Purchase Order to Trident Maritime Systems LLC on a sole source basis for the aforementioned services. A properly approved Other than Full and Open Competition Memo is included as Attachment III. It is expected that award will be made by no later than 14 July 2023. The Military Sealift Command (MSC) requires professional engineering services for the development and regulatory approval of Machinery Centralized Control System (MCCS) software upgrades and associated documentation in support of T-AO 205 Class Distilling Plant Installation TRANSALT. The contractor shall develop ABS/USCG-approved software upgrades to integrate new status, control, and alarm and monitoring functionality for the equipment