
ADDX Corporation
Alexandria, VATenacious by Nature
Service detail: Engineering Readiness and Lifecycle Support
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Tenacious by Nature
Service detail: Engineering Readiness and Lifecycle Support
ATCSI LLC delivers specialized services and technical solutions in air traffic control systems integration, shipboard systems, manned and unmanned air systems, and air traffic control procedures and policy development. It provides program management, task-based curriculum development, technical training, information analysis, digital data services, systems engineering, and strategic project planning. With a workforce of subject matter experts, the team supports complex aerospace, defense, and maritime programs.
Project: Naval Air Traffic Management Program Support
We empower our people to do good and help others with simple solutions.
Service detail: Test & Evaluation

Committed to Excellence
Project: Predictive Logistics Implementation

Alexandria Insights, Inc. is a professional services firm incorporated in Virginia and founded in 2013 to help U.S. Government customers use technology effectively to solve problems of national significance. Its core capabilities span acquisition and program management, technical and systems engineering, and integrated product support and life cycle logistics.
Service detail: Acquisition and Program Management
Trusted Service - Proven Results
Project: Department of State Passport Processing Operations
Government Contractor, Seaport-e Prime Contract Holder and Experts on Navy Energy Conservation
Service detail: Engineering Services and Technical Support
Results-driven government contracting and business staffing solutions
Service detail: Engineering and Technical Solutions
From the Waterfront to Operational Edge
Service detail: Direct Operations Support

Engineering the Edge of Possible
Project: Heavy Demonstrator Mission

Engineering & Management
Service detail: Program and Project Management

Solutions. Integrity. Results.
Project: Shared Early Warning System (SEWS) Operations & Maintenance
Defense. Engineering. Innovation.
Project: USS PINCKNEY (DDG-91) CANES Installation

A Data Driven Company
Project: NOAA Radar Operations Center Mission Support Services
End-to-End Life Cycle Solutions for Defense and Federal Networks
Project: AN/USQ-82(V) Data Multiplex System (xDMS) Engineering Support

Optimizing Operational and Engineering Models with Dynamic Visualizations for Today's Warfighter
Service detail: Model-Based Systems Engineering (MBSE)

Continental Tide Defense Systems, Inc. (Continental Tide) provides programmatic, engineering, and technical services to the U.S. Navy, U.S. Coast Guard, Military Sealift Command, and other DoD organizations. Headquartered in Wyomissing, Pennsylvania, with offices near major naval installations in Virginia, California, Pennsylvania, Connecticut, and New Hampshire, it supports naval fleet operations through shipboard systems maintenance, modernization, engineering project delivery, and quality assurance management.
Service detail: Maintenance & Modernization

Decision Technologies, Inc. is a defense engineering and intelligence services provider headquartered in Arlington, Virginia. Founded in 2003, it delivers systems engineering, program management, in-service engineering, equipment repair, research and development, test and evaluation, and intelligence support to the Department of Defense and federal agencies. It provides specialized support for naval radar and missile programs across multiple directorates of the Program Executive Office Integrated Warfare Systems (PEO IWS), including AEGIS, Above Water Sensors, Surface Ship Weapons, and Ship Self-Defense Systems (SSDS). Additionally, it supports NSWC Crane and NSWC Port Hueneme, alongside strategic and policy programs for the Office of the Undersecretary of Defense for Intelligence (OUSD(I)).
Project: Naval Surveillance Radar Engineering and Logistics Support Services

Geotechnical engineering, construction inspection, materials testing, and software solutions
Project: I-495 Express Lanes Northern Extension (I-495 NEXT)

Engineering. Ingenuity.
Project: Longwood University Jarman Hall
Epsilon Systems Solutions, Inc. is a defense engineering and technical services provider headquartered in San Diego, California, with facilities in Portsmouth, Virginia, Mayport, Florida, and Pearl Harbor, Hawaii. Epsilon Systems provides marine engineering and ship repair for all classes of U.S. Navy vessels, C5ISR systems engineering and intelligence support, manufacturing of advanced military and commercial products, and technical services including geospatial analysis, environmental compliance, and simulation training. Operating over 125,000 square feet of repair, modernization, and manufacturing facilities near major U.S. Navy homeports, Epsilon Systems holds SUBSAFE certification on all classes of submarines and serves the U.S. Navy, NAVAIR, NAVSEA, and the broader national security community.
Service detail: Navy Ship Repair and Modernization

Excellence in Every Endeavor
Service detail: Facilities Engineering
Trusted to Deliver. Built to Serve.
Service detail: Engineering

Innovation through foresight
Project: MRAP JPO Systems Engineering Support