About the role
Application Security Engineer — Secure Mission Systems
Location: Mainly remote, with onsite work in Laurel, Maryland, typically one day approximately every six weeks for team-wide sprint planning Clearance: Active final DoD Secret clearance required
This position supports a pending contract opportunity and is contingent upon contract award, with an anticipated start in November 2026.
Build Security into Mission-Critical Software
At Rackner, you will help strengthen secure software supporting high-impact Department of Defense planning and decision-support missions.
This is a hands-on application-security role where you can influence how security is built into software from development through release. You will work closely with software engineers, AI/ML engineers, platform teams, DevSecOps professionals, and customer technical leads to identify meaningful risks, support vulnerability remediation, and strengthen secure-development practices.
Your work will go beyond running scanners or delivering reports. You will help teams understand security findings, separate actionable risks from false positives, verify fixes, improve software supply-chain security, and deliver resilient software with greater confidence.
You will:
* Integrate application-security testing throughout the software-development lifecycle. * Conduct and support static application-security testing using Fortify. * Conduct and support dynamic application-security testing using OWASP ZAP. * Support software-composition analysis and software supply-chain security using JFrog Xray. * Review and triage security findings, identify actionable vulnerabilities, and distinguish meaningful risks from false positives. * Work directly with software engineers to understand root causes, support remediation, and verify completed fixes. * Integrate automated security scanning into secure CI/CD and GitLab-based development workflows. * Strengthen dependency-management and software supply-chain controls throughout development and delivery. * Support application security within environments using GitLab, Artifactory, OpenShift, and Kubernetes. * Contribute to technical reviews, code reviews, software testing, and security-remediation activities. * Produce clear vulnerability findings, remediation reports, code-review observations, and technical documentation. * Support verification that software meets applicable functional, coding, and security requirements before release. * Collaborate with software, AI/ML, platform, DevSecOps, and customer technical teams.
What You’ll Bring
* Bachelor’s degree in Cybersecurity. * At least six years of experience involving cyber resilience, SAST, DAST, and software-vulnerability remediation. * Hands-on experience with Fortify, JFrog Xray, and OWASP ZAP. * Identifying, evaluating, triaging, and supporting remediation of application-security vulnerabilities. * Working directly with software-development teams to resolve security findings. * Experience with software supply-chain security, dependency risk, or software-composition analysis. * Understanding of secure software-development lifecycle practices. * Integrating automated security scanning into software-development or CI/CD workflows. * Ability to clearly document technical findings and communicate them to developers and technical stakeholders.
Experience That Can Strengthen Your Fit
Experience with several of the following can improve alignment:
* GitLab-based development and CI/CD workflows. * Artifactory or similar artifact-management platforms. * OpenShift, Kubernetes, and containerized application environments. * Additional SAST, DAST, dependency-scanning, or software-composition-analysis tools. * Secure-code review and remediation verification. * Application-security testing in disconnected, restricted, or customer-managed environments. * Supporting classified, defense, aerospace, government, or other regulated software environments. * Collaboration across application security, software engineering, platform, DevSecOps, and AI/ML teams.
You do not need equal depth in every area, but your background should include direct experience with the named application-security tools and workflows.
Why Rackner
At Rackner, you will have the opportunity to protect technology supporting critical defense and public-sector missions.
You will work on more than isolated scan execution or vulnerability reports. This role combines hands-on application-security testing, vulnerability analysis, remediation verification, software supply-chain security, and close collaboration across software, AI/ML, platform, and mission-focused teams.
Rackner has delivered more than $30 million in recent federal awards and supports mission-critical work across defense, civilian, and public-sector environments. We are looking for an application-security engineer who can build on that momentum by strengthening secure delivery, helping teams resolve vulnerabilities, and improving confidence in the software reaching mission users.
Benefits & Professional Growth
* Competitive compensation * Company-supported certifications aligned with current and future program work * 401(k) with 100% company match up to 6% * Medical, dental, vision, life, and disability coverage * Paid time off and company holidays * Remote-work support and home-office equipment plan * Fitness and wellness reimbursement * Weekly pay schedule * Professional-development and future growth opportunities
Apply
If you are an application-security professional who wants broader influence across secure development, automated security testing, vulnerability remediation, and software supply-chain security, we would like to hear from you.