Continental Tide Defense Systems Inc.,* Wyomissing, Pennsylvania (N64498-24-D-4018); Delphinus Engineering Inc.,* Eddystone, Pennsylvania (N64498-24-D-4014); Epsilon Systems Solutions Inc.,* Portsmouth, Virginia (N64498-24-D-4015); General Dynamics Information Technology Inc., Falls Church, Virginia (N64498-24-D-4016); HII Fleet Support Group LLC, Virginia Beach, Virginia (N64498-24-D-4013); Life Cycle Engineering Inc.,* North Charleston, South Carolina (N64498-24-D-4019); NDI Engineering Co.,* Thorofare, New Jersey (N64498-24-D-4020); Q.E.D. Systems Inc.,* Virginia Beach, Virginia (N64498-24-D-4017); Serco Inc., Herndon, Virginia (N64498-24-D-4021); Valkyrie Enterprises LLC, Virginia Beach, Virginia, (N64498-24-D-4022); and VT Milcom Inc., Virginia Beach, Virginia (N64498-24-D-4023), are awarded a combined $496,122,397 cost-plus-fixed-fee, indefinite-delivery/indefinite-quantity contract for the procurement involving hull, mechanical and electrical machinery and systems services in support of surface fleet, submarine, shore-based installations, other federal agency vessels, and select maritime agency vessels and land-based sites. Each awardee will be awarded $500 (minimum contract guarantee per awardee) at contract award. The contracts awarded to the 11 vendors are not to exceed a combined or total value of $496,122,397, over a five-year ordering period. Work will be performed at various locations, including private shipyards, naval shipyards, and military establishments both in the continental U.S. and overseas, and will also require work to be performed at the contractor facility. Work is expected to be completed by July 2030. Fiscal 2024 operations and maintenance (Navy) funding in the amount of $5,500 will be obligated at the time of award and will expire at the end of the current fiscal year. All other funding will be made available at the task order level as contracting actions occur. This contract was competitively procured utilizing full and open competition via the System for Award Management website, with 11 offers received. The Naval Surface Warfare Center Philadelphia Division, Philadelphia, Pennsylvania, is the contracting activity.