Legacy Systems jobs in Fairfax, VA

Chantilly, Virginia

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Today

Job ID: 2615337 Location: Chantilly, VA, US Date Posted: 2026-08-06 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 Software Systems Engineer to support SAIC's Prime Program, Landmark AOS in Chantilly, VA. Landmark AOS is a large SETA program, supp

Full-time

USD 160,001.00 - 200,000.00 per year

Digital Systems Engineer

Chantilly, Virginia

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Today

Job ID: 2614812 Location: Chantilly, VA, US Date Posted: 2026-07-22 Category: Engineering and Sciences Subcategory: Digital Engineer Schedule: Full-Time Shift: Day Job Travel: No 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 a Digital Systems Engineer to fill a critical position on a SAIC's Prime Program in Chantilly, VA. SAIC supports a large SETA program supporting the NRO's Gro

Full-time

USD 160,001.00 - 200,000.00 per year

Senior Solution Engineer

Chantilly, Virginia

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Today

Job ID: 2615595 Location: Chantilly, VA, US Date Posted: 2026-08-12 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 a Senior Solution Engineer to fill a critical position on the LANDMARK AOS program. LANDMARK AOS is a large SETA contract responsible for t

Full-time

USD 160,001.00 - 200,000.00 per year

DevSecOps Engineer Principal - Platform

Arlington, Virginia

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Today

Job ID: 2615221 Location: Arlington, VA, US Date Posted: 2026-08-04 Category: Software Subcategory: DevSecOps Schedule: Full-Time Shift: Day Job Travel: Yes - 10% of the time Minimum Clearance Required: TS.SCI Clearance Level Must Be Able to Obtain: None Potential for Remote Work: ORA_HYBRID Description At SAIC, we're on a mission to revolutionize national security through cutting-edge technology and innovation. As the leading Joint All Domain Command and Control (JADC2) integrator, we

Full-time

USD 160,001.00 - 200,000.00 per year

Senior Technical Lead

Washington, District of Columbia

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Today

Job Number: R0247360 Technical Lead, Senior The Opportunity: At a certain point, experience -based system design can start to look like clairvoyance. When you've develop ed 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 develop ment accomplishments and the curiosity to understand ho

Full-time

USD 112,800.00 - 257,000.00 per year

Defense Solutions Architect

Hybrid in McLean, Virginia

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Today

Job Number: R0246764 Defense Solutions Architect 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 software development accomplishments and the curiosity to understand h

Full-time

USD 99,000.00 - 225,000.00 per year

Senior Full Stack Engineer

Fairfax, Virginia

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Today

Job Description Everforth ECS is seeking a highly skilled Full Stack Engineer with extensive experience in designing, building and maintaining large scale API's for enterprise level applications in support of the Department of Homeland Security. Tools necessary for excelling in this role include Java (with Maven, Gradle, etc), JavaScript Frontend frameworks (React, Angular, etc), Elastic and other data sources, and DevSecOps in the Cloud. This role will focus heavily on modernizing legacy system

Full-time

USD 130,000.00 - 160,000.00 per year

Senior Automation Test Engineer

Chantilly, Virginia

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Today

Job Number: R0245986 Automation Test Engineer, Senior 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 unders

Full-time

USD 99,000.00 - 225,000.00 per year

Senior Full Stack Engineer

Arlington, Virginia

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Today

Job Description Everforth ECS is seeking a highly skilled Senior Full Stack Engineer to remotely or in the Washington, DC metro area with extensive experience in designing, building and maintaining large scale API's for enterprise level applications in support of the Department of Homeland Security. Tools necessary for excelling in this role include Java (with Maven, Gradle, etc), JavaScript Frontend frameworks (React, Angular, etc), Elastic and other data sources, and DevSecOps in the Cloud. Th

Full-time

USD 140,000.00 - 160,000.00 per year

Senior Appian Plugin Developer- Remote

Remote or Reston, Virginia

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4d ago

We are seeking a Senior Appian Plugin Developer to support a structured Appian Cloud migration engagement delivered through an Autonomous Delivery Pod model. This role is focused on modernizing custom Appian plugins and ensuring full compatibility with Appian Cloud architecture within a regulated enterprise environment. The selected candidate will operate within a cohesive, outcome-driven delivery team accountable for plugin modernization, application remediation, cloud deployment readiness, an

Full-time

USD 98,614.00 - 167,644.00 per year

Acquisition Specialist

Washington, District of Columbia

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Today

Knowledge Management, Inc. (KMI) has the leadership and experience to deliver innovative technology, logistics and management solutions to meet real mission requirements. KMI is a Minority Business Enterprise (MBE) and Small Disadvantage Business (SDB) that specializes in Logistics, Warehouse Services, Distance Learning/Training, Enterprise Solutions, Financial Management Support, Program Management, Intelligence Analysis & Threat Assessment, and Data Analytics/Operations Research. Since 1998, o

Contract

Principal Solutions Architect

Reston, Virginia

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4d ago

ICF is a global advisory and technology services provider that partners with government and commercial clients to solve their most complex challenges. Our federal division helps agencies modernize legacy systems, harness data and AI, and deliver mission outcomes for the public they serve. We combine deep domain expertise with engineering rigor and human-centered design to build solutions that are secure, scalable, and built to last. We are seeking a Principal Solutions Architect to serve as a s

Full-time

USD 191,339.00 - 325,277.00 per year

Full Stack Engineer

Herndon, Virginia

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25d ago

Unissant, Inc. delivers innovative capabilities to the agencies that keep our nation healthy and safe. We apply our domain expertise, data acumen, and technology know-how to achieve breakthrough results for our clients. Working collaboratively, we advance missions and careers through a focus on honesty, integrity, and dependability. We continuously look for talent, excited to join that effort. To learn more about our exciting organization, please visit. We are seeking aFull Stack Engineerto join

Easy Apply

Full-time

Depends on Experience

Business Intelligence / Data Visualization Developer

Washington, District of Columbia

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4d ago

Infotrend is seeking aBusiness Intelligence / Data Visualization Developerto support a federal customer onsite in Washington, DC. This role is ideal for a hands-on BI professional with strong experience in Tableau development and administration, PostgreSQL/SQL, and Python-based reporting automation, with additional exposure to reusable datasets, automated reporting, and modernization of legacy BI environments. Federal government experience is strongly preferred. Requirements: Bachelors degree i

Easy Apply

Part-time

135,000 - 165,000

Phone Technician

Chantilly, Virginia

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Today

MANTECH?seeks a motivated, career and customer-oriented Phone Technician to join our team in Chantilly, VA. In this role, you are responsible for the installation, maintenance, and support of telecommunications systems, including VoIP and legacy phone systems, ensuring high-quality service delivery across Northern Virginia. Responsibilities include, but are not limited to: Support all facets of telephone installation, maintenance, and hardware troubleshooting a variety of telephone hardware (V

Full-time

Phone Technician Lead

McLean, Virginia

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Today

MANTECH?seeks a motivated, career and customer-oriented Phone Technician Lead to join our team in?McLean, VA. In this role, you are responsible for the installation, maintenance, and support of telecommunications systems, including VoIP and legacy phone systems. As the Lead, you will balance hands-on technical expertise with strong team leadership and administrative capabilities, managing a multi-skilled team to ensure high-quality service delivery across Northern Virginia. Responsibilities inc

Full-time

Sr .NET Blazor Developer

Remote or Tysons, Virginia

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Today

Overview The Senior NET Blazor is responsible for building secure, high-quality application features within the VA-EISS platform using Microsoft technologies, including C#, .NET, and Blazor for the Department of Veterans Affairs (VA), Office of Information and Technology (OIT), Product Delivery Services (PDS), Benefits and Memorials (BAM), Memorial and Benefit Services (MBS) deliver secure, reliable, and effective Information Technology (IT) solutions that support the Department's mission. Res

Full-time

Data Science AI Engineer

Remote or Tysons, Virginia

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Today

Overview The Data Scientist AI Engineer provides advanced data analytics, machine learning, and AI-driven solution engineering to support the Department of Veterans Affairs (VA), Office of Information and Technology (OIT), Product Delivery Services (PDS), Benefits and Memorials (BAM), Memorial and Benefit Services (MBS) deliver secure, reliable, and effective Information Technology (IT) solutions that support the Department's mission. Responsibilities Provide recommendations for data-driven A

Full-time

Senior AI Project Manager

Springfield, Virginia

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Today

Modern Technology Solutions, Inc. (MTSI) is hiring a Senior AI Project Manager in Springfield, VA. Responsibilities: Serve as the lead Artificial Intelligence and Machine Learning (AI/ML) Subject Matter Expert (SME) for an Intelligence Community rapid acquisition organization.Use rapid acquisition pathways to integrate disruptive AI/ML technologies into the analytic enterprise architecture.Provide programmatic support advising Government leads on the technical assessment, rapid prototyping, and

Full-time

USD 200,000.00 per year

UX Designer (Secret or TS Clearance Required)

Reston, Virginia

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Today

At ICF Next Government, we partner with federal clients to modernize digital services through human-centered design. We are seeking a UX Designer to support the design and evolution of federal websites and digital products as part of cross-functional delivery teams. This role is suited for a UX professional who can contribute to UX/UI delivery within Agile, DevSecOps-enabled programs and support user-centered transformation of legacy systems into modern, scalable platforms. Job Location If you a

Full-time

USD 81,499.00 - 138,549.00 per year

Legacy Systems jobs in Fairfax, VA, USA