Information Systems Security Engineer, ISSE

LMI

. Translate mission needs and security requirements into system architectures, control implementations, secure configurations, and testable acceptance criteria .

Posted 10/26/2026full-timeRemote • United StatesMid-LevelSenior💰 $92,075 - $158,138 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in systems security engineering and cloud security, with a strong focus on implementing and validating security controls for AWS infrastructure and Linux systems. Proficient in applying security frameworks and conducting vulnerability assessments while coordinating with engineering teams to ensure compliance and risk management.

Highest-signal resume keywords

AWS Security ImplementationLinux Systems HardeningThreat Modeling and Security Design ReviewsRMF and NIST SP 800-53 ApplicationActive Secret Security Clearance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Systems Security EngineeringCybersecurity EngineeringCloud SecuritySecure Platform EngineeringSecurity Controls ImplementationVulnerability ScanningConfiguration AutomationScriptingInfrastructure as CodeTechnical Risk Assessment

Soft Skills

Technical WritingTroubleshootingCoordinationIndependent WorkCollaboration

Tools & Technologies

AWS IAMKubernetesCloudTrailCloudWatchTCP/IP NetworkingFirewallsNetwork SegmentationIdentity and Access ManagementConfiguration Management ToolsCI/CD Pipelines

Certifications & Qualifications

Current Relevant Cybersecurity CertificationDoD 8140 Work-Role Requirements

Industry Keywords

DISA STIGsDoD Information SystemsDODINSecurity MonitoringAudit LoggingLeast-Privilege PermissionsEncryptionSecrets ManagementRisk Management Framework (RMF)Authorization Evidence

Tech Stack

Tools & technologies

AWSCloudCyber SecurityFirewallsKubernetesLinuxTCP/IP

About the role

Key responsibilities & impact

Translate mission needs and security requirements into system architectures, control implementations, secure configurations, and testable acceptance criteria
Perform threat modeling and security design reviews
Identify trust boundaries, attack surfaces, data flows, dependencies, and technical risks before deployment
Engineer and implement security controls for AWS infrastructure, Linux systems, containers, Kubernetes, application interfaces, and supporting services
Configure and validate identity and access controls, least-privilege permissions, network segmentation, encryption, certificates, secrets management, audit logging, and security monitoring
Apply DISA STIGs and approved hardening baselines; test changes for security effectiveness and mission impact
Integrate security scanning and checks into CI/CD pipelines
Use scripting, infrastructure as code, and configuration automation to deploy repeatable controls, detect configuration drift, and collect technical evidence
Analyze vulnerability findings, implement fixes, retest remediation, and propose compensating controls when needed
Develop and execute security verification tests and support authorized assessments
Troubleshoot application, network, cloud, identity, and container security issues
Produce security diagrams, configuration baselines, control implementation details, and test evidence supporting RMF activities and ATO packages
Coordinate technical remediation and closure evidence with the ISSO and ISSM
Document residual risks and recommendations for government risk decisions without independently accepting risk
Assess proposed system changes, maintain engineering documentation and runbooks, and support incident investigation, recovery, and corrective actions

Requirements

What you’ll need

Active Secret security clearance, with ability to obtain and maintain Top Secret if required
Minimum five years of relevant experience in systems security engineering, cybersecurity engineering, cloud security, secure platform engineering, or related technical field
Hands-on experience implementing, troubleshooting, and validating security controls
Experience engineering or securing DoD information systems, including systems operating on or connected to DODIN
Hands-on professional experience implementing, securing, operating, and troubleshooting AWS workloads
Practical experience with AWS IAM, VPC, security groups, compute and storage security, encryption, CloudTrail, and CloudWatch
Experience hardening and troubleshooting Linux systems and containerized workloads; working knowledge of Kubernetes security controls
Experience using scripting, infrastructure as code, or configuration-management tools to automate security tasks
Experience with source control and software delivery pipelines
Working knowledge of TCP/IP networking, routing, firewalls, network segmentation, secure application connectivity, certificates, encryption, and identity and access management
Experience applying RMF requirements, NIST SP 800-53 controls, STIGs, vulnerability scanning, remediation practices, and authorization evidence
Current relevant cybersecurity certification and ability to meet applicable contractual workforce qualifications, including DoD 8140 work-role requirements where applicable
Strong technical writing, troubleshooting, and coordination skills
Ability to work independently with distributed engineering teams and support periodic travel
U.S. Government security clearance eligibility; only U.S. Citizens are eligible for a security clearance
A college degree is not required

Benefits

Comp & perks

Periodic travel may be required for integration, assessments, customer meetings, and access to approved facilities
Equal employment opportunity commitment
Application accommodations for persons with disabilities