Legacy Systems jobs in Fort Belvoir, VA

Washington, District of Columbia

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Today

A3 Technology, Inc. has an immediate opening for a Systems Engineer/Integrator in Washington, DC to assist with conducting comprehensive system-wide reviews and analyses of all aspects of the National Airspace System (NAS) development life cycle, particularly the Air Traffic Control (ATC) system, including ATC automation, communications, and navigation and surveillance elements of the NAS. Enterprise-level engineering support to the Transformative Technology Office's mission of planning, implem

Full-time

USD 50,000.00 per year

Aircraft Maintenance & Logistics Analyst

McLean, Virginia

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Today

RESPONSIBILITIES: Kforce has a client in McLean, VA that is seeking an Aircraft Maintenance & Logistics Analyst. About the Role: We are seeking an experienced to support a major bomber program within a defense acquisition and sustainment environment. This role will provide lifecycle logistics, maintenance, and sustainment expertise for aircraft, weapon systems, and support equipment programs. The ideal candidate will have a strong background in Integrated Logistics Support (ILS), sustainment pl

Full-time

$140,000 - $160,000 annually

Cyber Security Engineer - Expert

Reston, Virginia

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5d ago

Expert Cyber Security Engineers capture and refine information security requirements and ensure that the requirements are integrated into information technology component products and information systems through purposeful security architecting, design, development, and configuration. Duties include: Assists with leading development teams working to design and develop information systems or upgrade legacy systems.Conducts product research and support Analysis of Alternative (AoA) activities that

Full-time

USD 135,000.00 - 200,000.00 per year

Cyber Security Engineer (Expert) Job#927

Reston, Virginia

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Today

Cyber Security Engineer (Expert) Location: Reston, VA Clearance Required: TS/SCI and pass a poly Responsibilities Expert Cyber Security Engineers capture and refine information security requirements and ensure that the requirements are integrated into information technology component products and information systems through purposeful security architecting, design, development, and configuration. Duties include: Assists with leading development teams working to design and develop informatio

Full-time

GEOINT Ground Software Systems Engineer

Chantilly, Virginia

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Today

Job ID: 2617002 Location: Chantilly, VA, US Date Posted: 2026-10-20 Category: Engineering and Sciences Subcategory: Systems Engineer Schedule: Full-Time Shift: Day Job Travel: Yes - 10% of the time Minimum Clearance Required: TS.SCI_wPoly Clearance Level Must Be Able to Obtain: None Potential for Remote Work: ORA_ON_SITE Description SAIC is seeking GEOINT Ground Software Systems Engineer to support SAIC's Prime Program, Landmark AOS in Chantilly, VA. Landmark AOS is a large SETA progra

Full-time

USD 160,001.00 - 200,000.00 per year

Lead Application Developer - SME

Suitland-Silver Hill, Maryland

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Today

Multiple Openings Location: Suitland, MD Hybrid Proposal Opportunity: This position is being recruited in support of an active federal proposal. Employment is contingent upon contract award, final customer requirements, and position availability. Candidates selected during the proposal phase may be asked to provide an updated resume and other information required for proposal submission. About the Role Essnova Solutions is seeking experienced Lead Application Developers - SME to support a lar

Full-time

Computer Systems Analyst

Chantilly, Virginia

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Today

Job Title: Computer Systems Analyst Job Category: Service Contract Act Time Type: Full time Minimum Clearance Required to Start: Top Secret Employee Type: Regular Percentage of Travel Required: None Type of Travel: None * * * Job Description The Opportunity: Join our dynamic team as a Computer Systems Analyst and play a crucial role in supporting our fast-paced IT environment. This position offers the chance to enhance your technical skills, work with cutting-edge technologies, and prov

Full-time

USD 27.63 per hour

Sr. Application Developer SME

Washington, District of Columbia

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Today

Residency All applicants must currently reside in the United States Overview BigBear.ai is seeking a Sr. Application Developer to support the Defense Intelligence Agency (DIA). You will be joining our amazing BigBear.ai team to provide development for legacy and existing systems whether it's building out new features, enhancements, or bug fixes and adding features that will allow our successor system to integrate with older legacy systems so that both systems can co-exist. This position will b

Full-time

Senior Software Engineer

Chantilly, Virginia

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Today

Overview We are seeking an experienced Senior Software Engineer to provide development engineering and programming support for software projects and infrastructure support activities. The successful candidate will be responsible for designing, developing, modernizing, and maintaining software applications, including developing new cloud-based applications and transitioning legacy systems to cloud environments. This role requires experience with multiple programming languages, database archite

Full-time

Sr. Application Developer Front-End

Washington, District of Columbia

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Today

Residency All applicants must currently reside in the United States Overview BigBear.ai is seeking a Sr. Application Developer with Front-End focus to support the Defense Intelligence Agency (DIA). You will be joining our amazing BigBear.ai team to provide development for legacy and existing systems whether it's building out new features, enhancements, or bug fixes and adding features that will allow our successor system to integrate with older legacy systems so that both systems can co-exist.

Full-time

M365 Migration Support Engineer - Hybrid

Washington, District of Columbia

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Today

Job ID: 2617814 Location: Washington, DC, US Date Posted: 2026-10-12 Category: Software Subcategory: SW Testing Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: Secret Clearance Level Must Be Able to Obtain: None Potential for Remote Work: ORA_HYBRID Description SAIC is looking for an experienced Microsoft Exchange Online Technical Support Engineer to provide dedicated support for U.S. Army 365 (A365) end users. In this role, you will deliver high-quality techn

Full-time

USD 120,001.00 - 160,000.00 per year

Scrum Master / Delivery Lead / IT Project Manager

Alexandria, Virginia

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Today

The Office of Inspector General (OIG), Office of the Chief Information Officer (OCIO), provides enterprise IT services supporting approximately 2,000 end users across more than 60 global locations. OCIO delivers and sustains critical IT capabilities essential to the OIG mission, including database services, application support, IT asset management, mobile device management, domain services, networking operations, and service desk support. The Scrum Master / IT Project Manager is responsible for

Full-time

USD 150,000.00 - 175,000.00 per year

Scrum Master / IT Project Manager

Alexandria, Virginia

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Today

Full-time

USD 120,000.00 - 140,000.00 per year

OPIR Systems Engineer

Chantilly, Virginia

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Today

Job Number: R0248789 OPIR Systems Engineer The Opportunity: At a certain point, experience-based system design can start to look like clairvoyance. When you've developed so many systems that you can not only orchestrate the best solution for any technology-based challenge, but you can also anticipate and preempt future issues, you're a solutions architect. You've evolved your skills into strategy through a long path of sof tware development accomplishments and the curiosity to understand how al

Full-time

USD 99,000.00 - 225,000.00 per year

Senior Systems Engineer

Fort Belvoir, Virginia

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Today

Job ID: 2618085 Location: Fort Belvoir, VA, US Date Posted: 2026-10-19 Category: Engineering and Sciences Subcategory: Systems Engineer Schedule: Full-Time Shift: Day Job Travel: Yes - 10% of the time Minimum Clearance Required: TS.SCI Clearance Level Must Be Able to Obtain: TS/SCI with Poly Potential for Remote Work: ORA_ON_SITE Description SAIC has an immediate need for a System Integration office Foundation Layer Subject Matter Expert to support our team located at Fort Belvoir, Vir

Full-time

USD 140,001.00 - 180,000.00 per year

MuleSoft Developer(Only on W2)

Hybrid in Bethesda, Maryland

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16d ago

Role: MuleSoft Developer Location: Bethesda, MD Duration: Long Term Experience: 12+ Note: Only on W2 Responsibilities Design, develop, test, deploy, and support enterprise integrations using Mule 4 / Anypoint Platform. Build System, Process, and Experience APIs using API-led connectivity. Develop REST/SOAP APIs using RAML/OpenAPI. Create complex data transformations using DataWeave 2.0. Work with Anypoint Studio, API Manager, Runtime Manager, Exchange, and CloudHub/CloudHub 2.0. Integrate

Easy Apply

Contract

Depends on Experience

Software Engineer II - Engineering

Remote or Arlington, Virginia

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Today

Attention: Kapitus is aware that individuals posing as recruiters may be communicating with job seekers about supposed positions with Kapitus. Kapitus has received reports that the content and method of communication can vary, but messages may contain requests for payment (e.g., fees for equipment or training) and/or for sensitive financial information. Kapitus will never ask a candidate for employment for payment or financial information during the initial application or interview process. All

Full-time

USD 96,300.00 - 154,400.00 per year

Cloud Engineers, Senior Engineers, Architects & Automation Specialists (CBP)

Reston, Virginia

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Today

About Agile Defense At Agile Defense we know that action defines the outcome and new challenges require new solutions. That's why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next. Our vision is to bring adaptive innovation to support our nation's most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility-leveraging a foundation of speed, flexibility, and ingenuity

Full-time

Compensation information provided in the description

Senior Java Developer

Washington, District of Columbia

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Today

Requisition ID: 5317Standard Title: Required Security Clearance: Top Secret/SCI with CI PolygraphLocation: Washington, DCWork Type: Hybrid (On-Site and Remote)Shift: FirstReferral Eligibility: EligibleU.S. Citizenship Required? Yes Position Summary Base-2 Solutions is seeking a Senior Java Developer to modernize a critical government information system. The ideal candidate will have deep expertise in enterprise Java application development and a proven track record of upgrading complex software

Full-time

Chief Engineer

Chantilly, Virginia

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Today

Job Number: R0252091 Chief Engineer The Opportunity: At a certain point, experience -based system design can start to look like clairvoyance. When you've developed so many systems that you can not only orchestrate the best solution for any technology-based challenge, but you can also anticipate and preempt future issues, you're a solutions architect. You've evolved your skills into strategy through a long path of sof tware development accomplishments and the curiosity to understand how all the

Full-time

USD 86,800.00 - 198,000.00 per year

Legacy Systems jobs in Fort Belvoir, VA, USA