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Senior .NET​/C# Software Developer Security Clearance

Job in Arlington, Arlington County, Virginia, 22202, USA
Listing for: Amentum
Full Time position
Listed on 2026-01-13
Job specializations:
  • Software Development
    Software Engineer
Job Description & How to Apply Below
Position: Senior .NET/C# Software Developer with Security Clearance
Purpose and Impact:
Are you interested in using your skills to help shape the Cyber, Security, & Intel space? If so, look no further. Amentum is seeking a Senior .NET/C# Software Developer to join our team of passionate individuals in Ft. Belvoir, VA. In this role you will support challenging, mission-critical projects that make a direct impact on the Nation's security and intelligence mission.

INSCOM executes mission command of operational intelligence forces; conducts worldwide multidiscipline and all source intelligence operations; delivers advanced skills training, linguist support, specialized quick reaction capabilities, intelligence related logistics, and communications in support of Army, Joint, and Coalition command and the National Intelligence Community. You will be part of a team that provides comprehensive automation/information technology support to the Data Capabilities Division (DCD) worldwide intelligence dissemination, data management, and knowledge management missions.

Work Schedule:

• Monday-Friday, 8 hours/day, Core hours:

Essential Responsibilities:

• Provide application development for a Microsoft-oriented enterprise environment ("including, but not limited to , C#, MVC 4+, and Internet Information Services (IIS) for Windows Server web development knowledge) for custom in- house developed web applications.
• Collaborate with peers to review code to ensure that best practices, team norms, and coding standards are followed.
• Provide web development and version control for a Microsoft-oriented enterprise environment using Government provided tools (Microsoft Visual Studio and Git Lab).
• Estimate the level of effort required for all design, development, deployment, and testing and provide information to COR.
• Participate in an iterative development team through all facets of to include sprint planning, daily scrum meetings, reviews, and retrospectives.
• Develop documentation to include test plans, end-user documentation, wireframes, mockups, Use Case Diagrams, and flowcharts. All documentation shall be stored in identified Government document repositories.
• Use Azure Dev Ops (ADO) or Git Lab for all code changes and version controls.
• Create/update test plans and record the results within the developer documentation.
• Collaborate with the Quality Assurance (QA) team to mitigate all findings identified during testing.
• Build fully deployable packages for development, staging, integration, and production environments and submit deployment requests for approval.
• Use all approved Government provided templates for required documentation and ensure all development related documents are stored in a single document repository, identified by the Government.
• Leverage advanced programming skills to develop and incorporate mandatory fields of the DNI Audit.

XML specification in accordance with ICS-500-27 Collection and Sharing of Audit Data.
• Adhere to software development methods including Agile, SCRUM, and Lean in the development of software.
• Provide project status reports to the Government at all stages of the project lifecycle as required.
• Utilize JIRA to record and report bugs to Quality Assurance, project managers, and other stakeholders.
• Ensure SOPs, "How To" guides, testing plans, and accreditation paperwork are complete for each application. Work Environment, Physical Demands, and Mental Demands:
• Open office work desk within a SCIF.

Minimum Requirements (Knowledge, Skills, and Abilities):
• Ten years of experience in .NET Development (including .NET, C#, MVC 4+, and Internet Information Services (IIS) for Windows Server web development).
• Eight years of experience in SQL database development stored procedures
• Experience developing and re-architecting applications for containerization.
• Five years of experience with Software Development Life Cycle Process (SDLC)
• Five years of experience with software development Unit Testing, System Testing,
• Functional Testing, User Acceptance Testing, or other development testing experience
• Five years of experience mentoring junior personnel on proper practices and procedures.
• Five years of experience…
Position Requirements
10+ Years work experience
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