Mission-Critical Classified Systems Security Engineer (ISSE)

Dell; McLean (VA); On-site; USD 120,000 - 170,000; Full time

Job summary

Dell is seeking an ISSE - Federal Customer in McLean, VA, on-site five days a week. The Security Engineer will design, implement, and sustain secure solutions in a classified environment, embedding security into system design, hardening platforms, supporting authorization activities, and remediating vulnerabilities in partnership with engineering and operations teams.

The ideal candidate has deep security engineering discipline, experience with RMF and STIGs, strong documentation skills, and the

Qualifications

• Experience in security engineering, cybersecurity architecture, or secure systems integration.
• Experience with RMF, STIG, hardening standards, and vulnerability management.
• Knowledge of Windows, Linux, network, or platform security concepts.
• Ability to document technical controls and support accreditation efforts.
• Strong troubleshooting and cross-team collaboration skills.
• Active TS/SCI and ability to maintain access as required by the program.

Responsibilities

• Engineer security controls into systems, infrastructure, and integration workflows
• Support RMF implementation, accreditation, and authorization activities
• Perform hardening, secure configuration, and STIG compliance actions
• Assess vulnerabilities, coordinate remediation, and verify corrective actions
• Produce and maintain technical security documentation and artifacts
• Support system assessments, control validation, and audit responses
• Partner with platform, network, and operations teams to improve security posture
• Recommend technical improvements that reduce risk without disrupting mission execution

Skills

Security engineering

Cybersecurity architecture

RMF / STIG compliance

Vulnerability management

Windows / Linux security

Documentation of controls

Troubleshooting & collaboration

TS/SCI clearance

Tools

ACAS

SCAP

SIEM

PowerShell

Job description

Dell is seeking an ISSE - Federal Customer in McLean, VA, on-site five days a week. The Security Engineer will design, implement, and sustain secure solutions in a classified environment, embedding security into system design, hardening platforms, supporting authorization activities, and remediating vulnerabilities in partnership with engineering and operations teams.

The ideal candidate has deep security engineering discipline, experience with RMF and STIGs, strong documentation skills, and the