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Naval Sea Systems Command

The Naval Sea Systems Command (NAVSEA) is the largest of the Navy's five systems commands, responsible for , building, delivering, and maintaining ships, , and associated systems to support the Navy's fleet. Established on July 1, 1974, through the merger of the Naval Ship Systems Command (NAVSHIPS) and the Naval Systems Command (NAVORD), NAVSEA's origins trace back to 1794, when Commodore John Barry was tasked with overseeing the construction of the U.S. 's first six frigates. With a workforce of more than 86,000 civilian and across 42 activities worldwide, NAVSEA manages over 150 acquisition programs, encompassing , development, test, evaluation, depot maintenance, and in-service support for surface ships and . NAVSEA's core responsibilities include the full lifecycle management of naval vessels and systems, from design and procurement to sustainment and decommissioning, ensuring operational readiness for the fleet. It oversees critical functions such as shipbuilding, modernization, and repair at naval shipyards and private facilities, while also providing technical expertise through its Warfare Centers, which represent over 50 percent of the Navy's engineering and science capabilities. The command's Naval Surface Warfare Center (NSWC) and Naval Undersea Warfare Center (NUWC) serve as the Navy's primary hubs for research, development, test, and evaluation activities, supporting advancements in weapons, sensors, and propulsion technologies. Headquartered in , NAVSEA operates under the Assistant Secretary of the Navy for Research, Development and Acquisition, and it accounts for approximately one-quarter of the 's budget, enabling the delivery of more than 20 new ship classes over its 50-year history, including the Nimitz-class and Ford-class aircraft carriers, as well as Arleigh Burke-class destroyers. Through its four shipyards, seven Program Executive Offices, and extensive network of field activities, NAVSEA ensures the 's technological superiority and self-sufficiency in maritime operations.

Overview

Mission and Responsibilities

The Naval Sea Systems Command (NAVSEA) serves as the largest of the U.S. Navy's five systems commands, with primary responsibility for , acquiring, building, delivering, and maintaining the Navy's fleet of ships, , and systems to ensure operational readiness. This encompasses a broad scope of activities aimed at supporting the Fleet's current and future warfighting needs through technical expertise and resource management. NAVSEA oversees approximately 150 acquisition programs, managing an annual budget of nearly $30 billion and employing more than 80,000 civilian, military, and contractor personnel as of 2025. These resources enable comprehensive life-cycle management of naval assets, from initial and through sustainment, modernization, and eventual disposal, ensuring long-term fleet viability and cost efficiency. In parallel, NAVSEA integrates advanced technologies such as additive for on-board component production and for and process optimization, enhancing supply chain resilience and operational agility. These efforts are exemplified by NAVSEA's support for innovation initiatives like the Maritime Innovation Forum 2025, which convenes industry and leaders to accelerate the adoption of transformative manufacturing solutions. NAVSEA's mission aligns strategically with broader U.S. objectives, including the expansion of the fleet to over 300 ships by 2032 as outlined in the FY2025 shipbuilding plan, which emphasizes increased and technological to counter global maritime challenges. To execute these responsibilities, NAVSEA leverages its directorates and affiliated Program Executive Offices for coordinated program oversight and execution.

Leadership and Headquarters

The Naval Sea Systems Command (NAVSEA) is led by James P. Downey as , who assumed the role on January 3, 2024, and oversees the command's engineering, building, buying, and maintenance of ships, submarines, and combat systems for the U.S. Navy. As a three-star , Downey directs strategic priorities aligned with naval objectives, including lifecycle management and technological integration. Supporting the Commander is Executive Director Christopher Miller, a Senior Executive Service (SES) member who assumed duties in March 2024 and manages civilian operations, resource allocation, and policy implementation across NAVSEA's 86,000 personnel. Key supporting roles include Chief of Staff Captain Burt J. Canfield, who coordinates internal staff functions and advises on , and Command Master Chief Blake G. Schimmel, who represents enlisted personnel and ensures alignment with sailor welfare and training needs. NAVSEA's headquarters is located at the Washington Navy Yard in Washington, D.C., specifically in Building 197 (Humphreys Building) at 1333 Isaac Hull Avenue SE, serving as the central hub for command-wide policy development, guidance, and oversight in areas such as financial management, contracting, and logistics. This facility coordinates directly with the Chief of Naval Operations to align NAVSEA's activities with fleet requirements while providing essential support to field activities and Program Executive Offices (PEOs) for program execution and sustainment.

History

Origins and Establishment

The origins of the Naval Sea Systems Command (NAVSEA) trace back to the early years of the , specifically to March 1794, when authorized the construction of six frigates to bolster naval capabilities amid threats from and European powers. Commodore John Barry, appointed as the senior officer of the U.S. Navy, was tasked with overseeing this construction effort, marking the initial formal involvement of the Navy in and laying the groundwork for specialized naval constructors. Throughout the , the 's ship-related functions evolved through a series of bureaus established under the Navy Department, which was created in 1798. The Bureau of Construction, Equipment, and Repair was formed on August 31, 1842, as part of the initial bureau system to handle ship design, construction, and maintenance, replacing the earlier Naval Board of Commissioners. In 1862, amid the and the push for steam-powered vessels, the Bureau of Steam Engineering was established on July 5 to focus on propulsion and engineering advancements, later renamed the Bureau of Engineering in 1920. These entities operated alongside the , created the same day in 1862, which managed weaponry and related systems. By the early , the Bureau of Construction and Repair had been reorganized, splitting off the Bureau of Equipment and Recruiting in 1862 while retaining core responsibilities for hull and structural work. The pressures of necessitated greater integration of these functions, leading to the merger of the Bureau of Construction and Repair and the Bureau of Engineering into the on June 20, 1940. This new bureau centralized ship design, construction, maintenance, and engineering, playing a critical role in producing over 7,000 vessels during the war. Postwar, the continued under this name without major renaming until broader Department of Defense reforms in the 1960s prompted its redesignation as the Naval Ship Systems Command on May 1, 1966, to align with unified materiel commands focused on acquisition and logistics. NAVSEA was formally established on July 1, 1974, through the merger of the Naval Ship Systems Command and the (successor to the ), aiming to streamline management of naval sea-based systems under a single authority. This consolidation addressed fragmented responsibilities in , , and related technologies, with Vice Adm. Robert C. Gooding serving as the first commander. The creation reflected ongoing efforts to enhance efficiency in naval acquisition following the reorganizations.

Evolution and Key Developments

Following its establishment in , the Naval Sea Systems Command (NAVSEA) underwent significant expansion during the 1970s and 1980s to address escalating demands for advanced naval capabilities. The command consolidated shipyard activities and incorporated new programs focused on submarine systems and combat technologies, growing its workforce to support the development and maintenance of complex platforms such as nuclear-powered submarines and surface combatants. By the mid-1980s, NAVSEA had integrated responsibilities for , , and systems, enabling the delivery of key assets like the Ohio-class submarines and Aegis-equipped destroyers to enhance U.S. naval deterrence and . In the , NAVSEA adapted to post- realities through reforms emphasizing efficiency amid fleet downsizing and base closures. The command reduced its workforce as part of broader restructuring, while integrating logistics support functions via initiatives like the Core Equities program, which evaluated in-house versus outsourced capabilities to optimize . Environmental programs were incorporated into sustainment practices to comply with emerging regulations, and acquisition reforms promoted industrial best practices, shifting focus toward littoral operations under the "Forward...From the Sea" doctrine of 1994. These changes helped NAVSEA maintain operational readiness as the battle force fleet contracted from a peak of 594 ships to around 300 by decade's end. Entering the 21st century, NAVSEA aligned with the Navy's Sea Enterprise initiative in , a transformative effort to streamline processes, reduce overhead, and substitute for manpower, thereby improving efficiency in and maintenance. This built on prior reforms by enhancing business practices across the enterprise. In 2020, NAVSEA disestablished its Warfighting Capability and Enterprise Readiness Directorate (SEA 06), reintegrating its research, development, test, and evaluation components into Program Executive Offices and other directorates to foster greater integration and agility. Post-2020 developments have emphasized technological innovation to meet evolving threats, including the adoption of digital twins for shipyard optimization and , as well as unified cybersecurity efforts within the directorate to protect naval systems. NAVSEA has aligned with the 's FY2025 shipbuilding plan, which projects delivery of 10 new ships while retiring 19 to build toward a 381-ship fleet by 2054, prioritizing distributed lethality and readiness. Recent emphasis includes sustainable practices in manufacturing and participation in forums like the 2025 Maritime Innovation Forum, which highlighted advanced technologies for efficiency and . These evolutions have influenced the structure of NAVSEA's directorates and Program Executive Offices by promoting cross-functional integration.

Organizational Structure

Directorates

The Naval Sea Systems Command (NAVSEA) operates through nine functional directorates at the II level, which provide essential headquarters support for financial, contractual, engineering, operational, and administrative functions across the naval enterprise as of 2025. These directorates collaborate with Program Executive Offices (PEOs) to ensure seamless execution of acquisition and sustainment activities. Each directorate focuses on specialized areas to maintain fleet readiness, technological advancement, and compliance with naval policies. SEA 01 (Comptroller) oversees , including policy development, , , and to ensure efficient allocation of resources for naval programs. This directorate manages appropriation areas and provides fiscal guidance to support NAVSEA's annual execution. SEA 02 (Contracts) directs acquisition strategies, contract awards, and supplier oversight, handling approximately $36 billion in annual procurements for ships, , repairs, and related services. It ensures with federal acquisition regulations while fostering competition and innovation among industry partners. SEA 03 (Cyber Engineering & ), formerly aligned with fleet readiness elements, now emphasizes , cybersecurity for naval platforms, and digital modernization to enhance operational resilience. This directorate develops policies for , , and to protect against evolving threats. SEA 04 (Industrial Operations) provides oversight of naval shipyards, optimizes production efficiency, and drives workforce development initiatives to sustain industrial base capabilities. It integrates maintenance planning across four public shipyards and four Supervisor of Shipbuilding offices, focusing on cost-effective operations and labor skill enhancement. SEA 05 (Naval Systems Engineering) establishes engineering standards, facilitates , and serves as the technical authority for ship and platforms throughout their lifecycle. Comprising 16 specialized groups, it delivers expertise in , testing, , and disposal to ensure platform reliability and performance. SEA 06 (Sustainment), evolving from prior logistics-focused roles, manages fleet readiness through , planning, and sustainment policies for surface and undersea assets. It coordinates support to minimize downtime and maximize operational availability for the fleet. SEA 07 (Undersea Warfare) invests in for and undersea systems, including , , testing, and fleet to advance long-term naval capabilities. This directorate aligns with (CNO) priorities for strategic undersea dominance. SEA 09 (Safety & Regulatory Compliance) coordinates regulatory adherence, protocols, and environmental standards across NAVSEA activities, realigning prior fragmented efforts to mitigate risks in operations and . Established in , it supports and enforcement for all functions. SEA 10 (Total Force & Corporate Operations) delivers administrative support, management, services, and policy implementation for directorates, PEOs, and field activities. It encompasses , workforce , and enterprise-wide operational support to enable cohesive NAVSEA performance.

Program Executive Offices

The Program Executive Offices (PEOs) affiliated with the Naval Sea Systems Command (NAVSEA) are responsible for the full life-cycle management—from through acquisition, , , and sustainment—of assigned naval platforms and systems, ensuring alignment with fleet requirements for warfighting capability and affordability. As of 2025, NAVSEA works with seven such PEOs, each led by a or senior executive service member reporting to the Assistant of the Navy for , , and Acquisition, to deliver integrated solutions that enhance naval and deterrence. These offices collaborate with NAVSEA directorates for enabling functions such as contracting and engineering support. PEO Aircraft Carriers oversees the design, construction, delivery, and life-cycle support of all U.S. nuclear-powered aircraft carriers, including the legacy Nimitz-class (CVN 68) and the advanced Gerald R. Ford-class (CVN 78), with a focus on for , , and survivability to enable global . The former PEO Littoral Combat Ships was renamed and reorganized in 2019 into PEO Unmanned and Small Combatants, which now provides oversight for the (LCS) program—encompassing both Freedom- and Independence-class variants—and the Constellation-class (FFG 62), emphasizing modular mission capabilities for , mine countermeasures, and in littoral environments. This PEO also manages small surface combatants and craft, including patrol boats for and . PEO Ships directs the acquisition and complete life-cycle support for all non-nuclear surface ships, including surface combatants such as the Arleigh Burke-class destroyers (DDG 51) and the next-generation DDG(X); amphibious ships like the America-class amphibious assault ships (LHA 6) and San Antonio-class amphibious transport docks (LPD 17); and auxiliaries and expeditionary vessels, such as the John Lewis-class fleet replenishment oilers (T-AO 205), Expeditionary Fast Transports (EPF), and Expeditionary Sea Bases (ESB), to support distributed maritime operations and logistics. Under Team Submarines, PEO Attack Submarines (PEO SSN) focuses on new construction and sustainment; PEO Strategic Submarines (PEO SSBN) leads the development to replace the Ohio-class SSBN for continuous strategic deterrence through the 2080s; and PEO Undersea Warfare Systems (PEO UWS) enhances combat capabilities across all classes, including SSGN conversions and undersea sensors for improved cybersecurity and resiliency. PEO Integrated Warfare Systems leads the development, integration, and sustainment of combat systems, including sensors, weapons, radars, and command-and-control architectures like the Aegis Weapon System, to provide networked lethality and awareness across surface and air platforms for joint all-domain operations. NAVSEA's digital transformation efforts, including cybersecurity, data analytics, and digital engineering for naval systems, are primarily supported through the SEA 03 Corporate Operations Directorate rather than a dedicated PEO, integrating these capabilities across all platforms to accelerate innovation and readiness.

Field Activities

Technical and Logistics Support Activities

The Naval Surface Warfare Centers (NSWC) serve as NAVSEA's primary field activities for , , test, and evaluation (RDT&E), analysis, and in-service engineering support for surface ships, , combat systems, , and strategic s. Comprising eight divisions located across the , such as the Dahlgren Division specializing in and systems testing and the Carderock Division focused on form design and propulsion technologies, the NSWC provide technical operations, engineering services, and products to equip and sustain the fleet. These centers conduct prototyping, , and lifecycle support to ensure operational readiness of surface and subsurface platforms. The Naval Undersea Warfare Center (NUWC) operates through its two main divisions in Newport, Rhode Island, and Keyport, Washington, delivering RDT&E, engineering, and fleet support for undersea warfare capabilities, including submarine acoustics, torpedoes, and autonomous undersea vehicles. The Newport Division emphasizes undersea weapons systems development and integration, while the Keyport Division focuses on sustaining undersea systems through testing, evaluation, and logistics integration for submarines and submersibles. These activities ensure the reliability and advancement of undersea technologies critical to naval operations. The Naval Sea Logistics Center (NSLC), headquartered under the NUWC Keyport Division, manages for fleet sustainment, including spare parts provisioning, , and oversight across more than 30 sites in 12 states and With over 1,000 military, civilian, and contractor personnel, NSLC provides engineering technical support, maintenance planning, and solutions to maintain weapon systems and platforms throughout their lifecycle. This includes supply support outfitting and modernization efforts to enhance fleet availability and reduce downtime. The Technical Representative (TECHREP), an Echelon Three field activity based in , delivers on-site technical oversight and validation for the Weapon System during all phases, from RDT&E and production to modernization and in-service support at shipyards and fleet units. Activated in 1969, TECHREP ensures combat system design integrity through engineering assessments and contractor coordination, supporting capabilities. Following the disestablishment of NAVSEA's Warfighting Capability and Enterprise Readiness Directorate (SEA 06) in October 2020, its functions were reintegrated into Program Executive Offices and other NAVSEA components, bolstering prototyping initiatives and overall fleet readiness through enhanced sustainment and technical integration. These technical and support activities align closely with NAVSEA's Program Executive Offices to facilitate seamless across surface, undersea, and combat platforms.

Conversion and Repair Activities

The Supervisors of Shipbuilding, Conversion, and Repair (SUPSHIP) serve as NAVSEA's primary field activity for overseeing private sector contracts related to ship construction, conversion, and repair. These four commands—located in Bath, Maine; Groton, Connecticut; the Gulf Coast (Pascagoula, Mississippi); and Newport News, Virginia—act as the Navy's on-site technical, contractual, and business representatives, managing over $193 billion in contracts for new construction, nuclear repairs, and modernizations of vessels including aircraft carriers, submarines, surface combatants, and amphibious ships. With more than 1,400 military and civilian professionals, SUPSHIPs ensure compliance with cost, schedule, and quality requirements across multiple private shipyards, such as those in Bath, Marinette, Wisconsin, and San Diego, California. Navy Regional Maintenance Centers (RMCs), under the Commander, Navy Regional Maintenance Center (CNRMC) headquartered in , provide in-service engineering and depot-level repair support for surface ships at key operational ports. Established in 2010, CNRMC oversees RMCs that execute maintenance availabilities, continuous upkeep, emergent repairs, and voyage repairs to sustain fleet readiness for over 160 ships. Notable locations include the Mid-Atlantic RMC in ; Southwest RMC in , ; and Hawaii RMC at , , where they coordinate intermediate- and depot-level work to address hull, mechanical, and electrical issues during operational cycles. These activities support broader ship modernization programs, including mid-life extensions and capability upgrades aligned with fiscal year 2025 (FY2025) objectives to enhance fleet longevity and warfighting effectiveness. For instance, NAVSEA's efforts under SEA 21 integrate modernization plans that extend service lives for platforms like cruisers and amphibious ships, with decisions in November 2024 adding up to 10 years of cumulative life from FY2026 onward following extensive hull and systems upgrades. In September 2025, the Secretary of the Navy announced service life extensions for 12 Arleigh Burke-class destroyers, adding up to 36 years of cumulative service life from fiscal year 2026 onward. In FY2025, these programs emphasize targeted enhancements to combat systems and propulsion, ensuring ships meet evolving threats while managing lifecycle costs. Coordination with industry partners is central to these operations, particularly through SUPSHIPs and RMCs enforcing NAVSEA standards for , , and electrical (HM&E) systems to achieve first-time quality and . Under SEA 04 Industrial Operations, this involves collaborative oversight at facilities, including technical reviews, support, and environmental assessments to align work with specifications. Such integration ensures seamless execution of repairs and conversions, with RMCs providing on-site validation of HM&E upgrades during depot maintenance.

Facilities

Warfare Centers

The Naval Surface Warfare Center (NSWC) comprises eight divisions dedicated to advancing surface ship technologies, with specialized expertise in propulsion, weapons, survivability, and related areas. The NSWC Carderock Division, located in Bethesda, Maryland, focuses on ship design and engineering, including hull form optimization, propulsion systems, and survivability enhancements through modeling and testing facilities. The NSWC Philadelphia Division specializes in surface and undersea machinery, power systems, controls, and auxiliary ship systems, supporting propulsion efficiency and mechanical reliability for naval vessels. For weapons and survivability, the NSWC Indian Head Division leads in energetics and explosive ordnance disposal technologies, developing warheads, propellants, and safe-arm devices critical for surface ship armaments. Similarly, the NSWC Dahlgren Division drives surface ship weapons system development and integration, encompassing combat systems, missile defense, and launch/recovery mechanisms to enhance platform lethality and resilience. The NSWC Corona Division provides analytics and data-driven performance assessments for naval systems. The NSWC Crane Division specializes in electromagnetic warfare, expeditionary warfare systems, and strategic systems components. The NSWC Panama City Division focuses on mine warfare and littoral warfare systems. The NSWC Port Hueneme Division handles integrated logistics and test and evaluation for surface warfare combat systems. The Naval Undersea Warfare Center (NUWC) divisions provide core capabilities in undersea domains, emphasizing , ocean engineering, and unmanned undersea vehicles (UUVs). The NUWC Newport Division conducts full-spectrum research, development, test, and evaluation for undersea, subsea, and , including advanced systems, integration, and UUV prototyping to maintain undersea superiority. Complementing this, the NUWC Keyport Division sustains undersea warfare systems and vehicles, focusing on in-service engineering for arrays, ocean engineering solutions, and UUV maintenance to ensure operational readiness. These warfare centers integrate closely with NAVSEA's Program Executive Offices (PEOs) by delivering prototyping, , and fleet support across the acquisition lifecycle. For instance, NSWC divisions provide and test data to PEOs for surface systems, while NUWC supports undersea PEOs through -based and testing for . This collaboration ensures technical solutions transition from concept to fleet deployment, including fleet support for on advanced systems. Post-2020 expansions have enhanced warfare center capabilities in . Additive labs, such as those at NSWC Head for propellant production and NUWC Keyport for undersea component fabrication, enable and . Cyber test facilities have also advanced, with NSWC Dahlgren leading resiliency challenges and engineering support for cybersecurity across warfare centers to counter digital threats in naval systems.

Shipyards and Maintenance Centers

The Naval Sea Systems Command (NAVSEA) operates four public naval shipyards that serve as critical facilities for the construction, overhaul, repair, and modernization of U.S. vessels, ensuring fleet readiness and sustaining the . These shipyards are undergoing significant upgrades through the Shipyard Infrastructure Optimization Program (SIOP), a $21 billion initiative launched in to modernize facilities, equipment, and infrastructure across all four sites, with ongoing projects as of to enhance capacity for future naval operations. They function under the "One Shipyard" concept, which optimizes resource allocation, workload leveling, and workforce mobilization across locations to support and maintenance activities. Key operations include dry docking, outfitting, conversion, and testing, all aimed at maintaining operational capabilities for surface ships, submarines, and other naval assets. Norfolk Naval Shipyard, located in Portsmouth, Virginia, is the oldest and largest continuously operating shipyard in the United States, established in 1767 and now focusing on comprehensive logistic support, including overhaul and repair for nuclear-powered submarines and aircraft carriers. Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility (IMF), in Pearl Harbor, Hawaii, provides similar services with an emphasis on supporting Pacific Fleet operations, handling ship repairs and modernizations to enhance regional readiness. Portsmouth Naval Shipyard, situated in Kittery, Maine, specializes in the overhaul and repair of nuclear submarines, contributing to the stabilization of the industrial base through specialized manufacturing and testing. Puget Sound Naval Shipyard and IMF, based in Bremerton, Washington, conducts shipyard operations for both surface ships and submarines, including complex repairs and environmental compliance efforts to sustain West Coast fleet assets. In addition to the shipyards, NAVSEA oversees maintenance through the Commander, Navy Regional Maintenance Center (CNRMC), established on December 15, 2010, and headquartered in , which coordinates depot- and intermediate-level maintenance for over 160 surface ships worldwide. CNRMC manages a network of Regional Maintenance Centers (RMCs) that execute availabilities such as continuous , emergent voyage repairs, modernization programs, and total ship readiness assessments, while also providing through the Navy Assessment and Management of Technical Skills (NAMTS) initiative. The RMCs include: Mid-Atlantic RMC in ; Southeast RMC in Mayport, Florida; Southwest RMC in San Diego, California; Forward Deployed RMC in Naples, Italy, with detachments in Manama, Bahrain, and Rota, Spain; Ship Repair Facility in , Japan; RMC Northwest at , Washington; and Hawaii RMC at , Hawaii. These centers integrate with shipyards to deliver coordinated maintenance strategies, supporting the Navy's goal of combat-ready vessels through assessments for the Board of Inspection and Survey and assistance from Maintenance Assist Teams.

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