Software Developer with Security Clearance

Location: Germantown MD
Clearance Required: Top Secret (DOE Q)
Employment Type: Full-Time
Position Overview
We are expanding our Classified Systems team to support both the current Nuclear Materials Management and Safeguards System (NMMSS) desktop/legacy environment and the upcoming modernization initiative. The successful candidate will design, develop, test, and maintain secure software across both the existing VBScript/C# desktop stack and the new C#, Angular, ASP.NET Core web stack with an MSSQL backend. This role requires collaboration with cross-functional teams, adherence to stringent security requirements, and participation in an Agile development process.
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Key Responsibilities

• Dual-Stack Software Development:
• Maintain and evolve the existing VBScript/C# desktop applications and MSSQL data layer.
• Develop new capabilities in the modern stack: C#, ASP.NET Core backend, and Angular front end.
• Data Management & Security:
• Design and implement secure data storage, retrieval, and migration strategies in MSSQL.
• Enforce secure coding practices, role-based access control, and data confidentiality.
• System Integration:
• Integrate with existing NMMSS components, services, and workflows; ensure interoperability between legacy and new systems.
• Quality Assurance:
• Write and execute unit, integration, and security tests; participate in code reviews; perform debugging and troubleshooting.
• SDLC & Agile Practices:
• Actively participate in Agile ceremonies (stand-ups, sprint planning, reviews, retrospectives); maintain comprehensive documentation throughout the lifecycle.
• Deployment & Operations Support:
• Assist with deployment, configuration, monitoring, and post-production support; contribute to incident response and root-cause analysis.
• Documentation & Knowledge Transfer:
• Create clear technical documentation.

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Essential Skills & Qualifications

• Programming & Frameworks:
• Proficient in C# (both desktop and web environments) and VB.NET.
• Experience with ASP.NET Core and modern front-end frameworks (Angular or React).
• Web & Desktop Development:
• Strong background in building secure, scalable web applications and Windows desktop applications.
• Databases:
• Advanced knowledge of Microsoft SQL Server, data modeling, and performance tuning.
• Tools & Practices:
• Visual Studio, Git, CI/CD pipelines, and unit/integration testing.
• Familiarity with SDLC and Agile methodologies.
• Cloud & Infrastructure (Desirable):
• Experience with Azure environments, Azure App Services; understanding of secure cloud and hybrid deployments.
• Communication & Collaboration:
• Strong written and verbal communication; ability to collaborate effectively in a multidisciplinary team.

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Preferred Experience

• Transition projects involving modernization from a legacy desktop environment to a web-based solution.
• Data migration or coexistence strategies between legacy MSSQL schemas and evolving data models.
• Prior work on classified or government-related systems requiring strict security controls.

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Typical Job Requirements

• Must hold a current Secret clearance .
• Bachelor’s degree in computer science, Information Systems, or a related field (or equivalent practical experience).
• Demonstrated experience across the software development lifecycle in a regulated environment.
• Strong problem-solving skills and analytical thinking.
• Ability to communicate effectively with technical and non-technical stakeholders.

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