TS/SCI Cybersecurity Engineer — App & Software Security

Cybersecurity Jobs; Alexandria (VA); On-site; USD 140,000 - 170,000; Full time

Job summary

Data Systems Analysts, Inc. (DSA) is hiring a TS/SCI-cleared Cybersecurity Engineer focused on application and software security in a secure DoD environment at NGIC.

You will own software security, conduct security testing, and perform code reviews to identify vulnerabilities and validate fixes. The role emphasizes implementing and maintaining security tooling (SAST, DAST, container scanning), integrating them into development and release processes, and evaluating tools to meet mission

Qualifications

• BS degree in Computer Science, Software Engineering, or related field; experience may substitute degree.
• TS/SCI clearance required.
• 5+ years in software development, application security, or secure software assessment.
• Hands-on development in Python, Java, C#, Go, or JavaScript with backend services/APIs/databases.
• Familiarity with OWASP Top 10 and CWE; ability to assess exploitability and impact.

Responsibilities

• Own software security within the cyber engineering team for applications, APIs, and back-end services.
• Conduct security testing of applications and validate fixes.
• Perform source code reviews against secure coding standards.
• Implement and maintain security tooling (SAST/DAST, dependency scanning, container scanning) and integrate into development/release processes.
• Evaluate open-source and commercial cyber tools for mission requirements.
• Partner with engineers, system admins, architects, ISSOs/ISSMs to define security requirements.
• Assess risk from major software changes, unpatched components, and end of support.
• Apply adversary techniques (MITRE ATT&CK) and perform threat modeling.
• Document test results, release risk, and RMF/ATO supporting evidence.
• Communicate software risks and fixes to technical teams and leadership.

Skills

Software security

Security testing

Code reviews

Threat modeling

RMF/ATO

Education

BS degree in Computer Science or related field

Tools

Fortify

SonarQube

Checkmarx

Burp Suite

OWASP ZAP

GitLab

Jenkins

CI/CD pipelines

AWS/GovCloud

Job description

Data Systems Analysts, Inc. (DSA) is hiring a TS/SCI-cleared Cybersecurity Engineer focused on application and software security in a secure DoD environment at NGIC.

You will own software security, conduct security testing, and perform code reviews to identify vulnerabilities and validate fixes. The role emphasizes implementing and maintaining security tooling (SAST, DAST, container scanning), integrating them into development and release processes, and evaluating tools to meet mission