Cybersecurity Engineer – Application/Software Security

Cybersecurity Jobs; Richmond (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 (Application Security) to secure software for mission-critical systems in a secure DoD environment.

This onsite role owns software security across the application lifecycle, from testing and code review to integrating security tools and RMF/ATO evidence. Located in Richmond, VA onsite, the role collaborates with engineering and compliance to translate requirements into practical security controls and ensure

Qualifications

• BS degree in Computer Science, Software Engineering, or related field; experience may substitute.
• TS/SCI Clearance.
• CompTIA Security+ (DoD 8140 compliant).
• Minimum 5 years in software development, application security, or secure software assessment.
• Hands-on development in Python, Java, C#, Go, or JavaScript; knowledge of back-end services, APIs, databases.
• Experience finding and validating software vulnerabilities via code review or testing.
• Familiarity with OWASP Top 10 and CWE; ability to communicate fixes clearly.

Responsibilities

• Own software security within the cyber engineering team across the application lifecycle.
• Perform security testing and validate remediations.
• Review code against secure coding standards to identify vulnerabilities.
• Implement, tune, and maintain security tools (SAST, DAST, dependencies, container scanning).
• Evaluate open-source and commercial tools for security fit and risk.
• Collaborate with engineers, admins, architects, ISSOs/ISSMs to define security requirements.

Skills

Software security

Application security

Secure coding

Threat modeling

SAST

DAST

CI/CD integration

RMF/ATO knowledge

MITRE ATT&CK

OWASP Top 10

Education

BS in Computer Science / related field

Tools

Fortify

SonarQube

Checkmarx

Burp Suite

OWASP ZAP

GitLab

Jenkins

AWS/GovCloud

SBOMs

RMF

NIST SP 800-53

eMASS

DISA STIG

Job description

Data Systems Analysts, Inc. (DSA) is hiring a TS/SCI-cleared Cybersecurity Engineer (Application Security) to help secure software that supports mission-critical systems in a secure DoD environment. In this onsite role, you will own software security activities across the application lifecycle, from testing and code review to integrating security tools and evidence for RMF and ATO efforts.

The position is located in Richmond, VA (onsite). The selected candidate will collaborate with engineering and compliance stakeholders to translate security requirements into practical technical solutions and confirm the right controls are in place.

What you’ll do

• Own software security within the cyber engineering team, offering technical guidance to secure applications, APIs, and back-end services.
• Perform security testing of applications and validate that remediations resolve identified findings.
• Review source code against secure coding standards to identify vulnerabilities, insecure design, and exploitable weaknesses.
• Implement, tune, and maintain software security tools, including SAST, DAST, dependency scanning, and container scanning, and integrate them into development and release workflows.
• Evaluate open-source and commercial cyber tools and source code to determine fit, security risk, and what can be adapted for mission requirements.
• Partner with engineers, system admins, architects, ISSOs, and ISSMs to define security requirements and confirm tools and controls are sufficient.
• Assess risk from major software changes, unpatched components, and software reaching end of support.
• Use adversary techniques such as MITRE ATT&CK and apply threat modeling to prioritize findings by real-world impact.
• Document independent test results, release risk, and technical evidence supporting RMF and ATO activities.
• Communicate software risks, findings, and practical fixes to technical teams, system owners, and leadership.

Required qualifications

• BS degree in Computer Science, Software Engineering, Computer Information Systems, Cybersecurity, or related field (experience may be substituted for degree).
• TS/SCI Clearance.
• CompTIA Security+ (DoD 8140 compliant).
• Minimum 5 years of combined experience in software development, application security, penetration testing, or secure software assessment.
• Hands-on software development experience in at least one language such as Python, Java, C#, Go, or JavaScript, with understanding of back-end services, APIs, and databases.
• Demonstrated experience finding and validating software vulnerabilities through code review, security testing, or technical assessment.
• Working knowledge of common application weaknesses such as OWASP Top 10 and CWE, including how they are exploited and how to fix them.
• Ability to assess exploitability and impact, and communicate clear, practical fixes to engineers and compliance staff.
• Ability to work independently as the primary software security resource on a cybersecurity team.

Tools and technologies

• Microsoft Copilot
• Python, Java, C#, Go, JavaScript
• SAST, DAST, dependency scanning, container scanning
• MITRE ATT&CK, OWASP Top 10, CWE
• Fortify, SonarQube, Checkmarx
• Burp Suite, OWASP ZAP
• GitLab, Jenkins
• SQL, Oracle, PostgreSQL
• AWS/GovCloud
• SBOMs, RMF, NIST SP 800-53, eMASS
• DISA Application Security and Development STIG

Preferred experience / qualifications

• GWAPT, OSCP, OSWE, CSSLP, PenTest+, CySA+, SecurityX/CASP+, CEH, CISSP, or other relevant certification.
• Experience with SAST/DAST tools such as Fortify, SonarQube, Checkmarx, Burp Suite, or OWASP ZAP.
• Penetration testing, red team, or web application testing experience.
• Experience integrating security checks into CI/CD pipelines (GitLab, Jenkins).
• Experience with SQL and relational databases (Oracle, PostgreSQL) and ETL workflows.
• Familiarity with containers, AWS/GovCloud, software supply chain security, or SBOMs.
• Familiarity with RMF, NIST SP 800-53, eMASS, and the DISA Application Security and Development STIG.
• Experience supporting DoD, U.S. Army, or Intelligence Community missions.

Security clearance and employment notes

• Many DSA positions require the ability to obtain a security clearance; security clearances may only be granted to U.S. citizens.
• Applicants accepting a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.
• DSA is an Equal Opportunity Employer and an E-Verify Employer.
• DSA requires background checks, where permitted by law.

Compensation: USD 140,000 - 170,000 per year.