Engineering and Support Services for Hull, Mechanical and Electrical Systems

Naval Sea Systems Command established a multiple-award Master IDIQ on March 15, 2021, for engineering and support services in hull, mechanical, and electrical (HM&E) systems upgrades, repairs, and maintenance across Navy modernization programs, with the ordering period closed as of March 14, 2026. The vehicle carried a combined potential value of $530.2 million across 228 task orders, of which $403.3 million (76%) has been obligated. Task-order activity declined from 53 orders in 2022 to 8 in 2026 (through April), reflecting the approach to the vehicle's ordering ceiling.

The vehicle's scope spans modernization and maintenance work on surface ships, submarines, and support vessels across CONUS and OCONUS locations. Recent task orders document installation of ship change documents (SCDs), machinery alterations (MAs), and technology refresh systems aboard DDG-51 class destroyers, LPD-17 and LPD-21 class amphibious ships, CVN carrier classes, and Virginia-class submarines. Work includes scalable integrated bridge system upgrades, machinery control system replacements, fire detection and actuation system modifications, navigation system installations, and hull-mechanical-electrical condition monitoring systems. A significant portion of orders support Navy alteration installation teams (AITs) executing DDG modernization backfit and tech refresh programs.

Five primes dominate the vehicle. General Dynamics Information Technology holds the largest combined potential value at $188.3 million across 16 orders; Delphinus Engineering ranks second with $159.6 million across 45 orders. HII Fleet Support Group, Continental Tide Defense Systems, and Epsilon Systems Solutions round out the top five with $46.9 million, $36.4 million, and $27.1 million respectively, collectively representing 86% of combined potential value. A long tail of six smaller contractors holds the remaining share.

Customer concentration is extreme: Naval Sea Systems Command placed 226 of 228 orders ($529.4 million combined potential value), with two additional orders distributed to Naval Supply Systems Command and Pacific Fleet Forces. Set-asides are minimal—95% of orders carry no set-aside designation, with small business accounting for 5% of the order count. Task-order ceiling values range from under $100 thousand to multi-million-dollar efforts; recent mega-orders include a $35.2 million ceiling for DDG modernization monitoring alterations and $68.9 million for alteration installation team support. The majority of recent orders employ cost-plus-fixed-fee pricing, with some cost-no-fee and firm-fixed-price exceptions. Place of performance spans Norfolk, San Diego, Yokosuka, Kittery, Groton, and shipboard locations worldwide.

Engineering and Support Services in support of upgrading, repairs and maintenance of Hull, Mechanical and Electrical (HM&E) systems for Navy Modernization Programs.