Senior Security & Compliance Engineer

US-VA-Arlington

LMI is seeking a Staff Security & Compliance Engineer to secure a common platform for onboarding, deploying, and hosting third‑party applications in support of HQDA G-4. This engineer will support the platform's authorization, maintain its security controls, and assess whether applications meet prescribed controls and hosting standards before deployment and during operations.

This is a hands‑on role for an engineer who can turn security requirements into automated checks, clear findings, and actionable evidence for government decisions.

LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial‑grade platforms and mission‑ready AI to federal agencies at commercial speed.

Leveraging our mission‑ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors‑helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.

• Lead the security engineering and documentation that support the platform's Risk Management Framework and Authority to Operate activities.
• Maintain the platform security baseline, control evidence, authorization documentation, and continuous monitoring approach.
• Map controls provided by the common platform and identify the application‑specific controls each third‑party vendor must satisfy.
• Assess third‑party applications against prescribed security controls and deployment and hosting standards.
• Review security evidence, test results, and vulnerability findings; document gaps, risk, and criteria for remediation.
• Provide government personnel with clear findings and technical recommendations so they can coordinate remediation with third‑party vendors. Validate remediation evidence before deployment or continued hosting.
• Integrate security checks, evidence collection, and monitoring into platform delivery and operations where practical.
• Communicate security posture and unresolved risks to government and program leadership.

• Bachelor's degree in cybersecurity, computer science, engineering, or a related field, or equivalent practical experience.
• Eight or more years of experience in security engineering, cloud security, Dev Sec Ops , or federal authorization.
• Demonstrated experience supporting DoD RMF and ATO activities.
• Strong knowledge of NIST security controls and federal cybersecurity requirements.
• Experience securing cloud‑hosted or enterprise application platforms.
• Experience assessing third‑party software against security controls, deployment requirements, and vulnerability findings.
• Hands‑on software engineering or scripting experience used to automate security control validation, evidence collection, vulnerability checks, or monitoring.
• Ability to work directly with platform engineers, application teams, government personnel, and vendor representatives.
• Active Secret clearance.

• Experience supporting the U.S. Army.
• Experience with AWS or another secure government cloud environment.
• Familiarity with policy as code, automated evidence collection, and continuous monitoring.
• Experience with container security, vulnerability management, identity, logging, or cloud security tooling.
• CISSP, Security+, or another relevant cybersecurity certification.

The target salary range for…