Fairbanks Morse LLC, Beloit, Wisconsin (N3220521D4106); and MAN Energy Solutions Middle East LLC, Dubai (N3220521D4105), are each receiving modifications (P00004) to previously awarded multiple-award, firm-fixed-price, indefinite-delivery/indefinite-quantity contracts N3220521D4105 and N3220521D4106 to increase the shared contract ceiling by $163,000,000 to a value of $333,000,000. These are hybrid contracts with firm-fixed-price and time-and-material orders. These modifications will allow continuous procurement of parts and services from the original equipment manufacturer (OEM) for ships’ diesel engines, and OEM authorized parts and service technicians in order to maintain the diesel engines aboard multiple classes of ships, including Military Sealift Command’s submarine tenders, hospital ships, dry cargo ammunition ships, fleet replenishment oilers, expeditionary mobile Bases, expeditionary transfer docks, large, medium speed roll-on/roll-off ships and the Kocak class of roll-on/roll-off container ships. Work will be performed worldwide, with the period of performance ending May 20, 2026. A five-year ordering period with a shared contract ceiling of $170,000,000 is currently on these contracts. No funding is being obligated via these modifications, as this is an indefinite-delivery/indefinite-quantity contract, where funding is obligated at the order level. Funding for the fiscal year in which orders are place will be utilized at that time. Military Sealift Command, Norfolk, Virginia, is the contracting activity.