Information Systems Security Engineer – ISSE

ABSC (Absolute Business Solutions Corp.)

. Provide cybersecurity and security-engineering services for the National Military Command Center .

Posted 9/23/2026full-timeArlington • Virginia • United StatesMid-LevelSenior💰 $120,000 - $206,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in cybersecurity and security engineering, with a strong focus on system security engineering, risk assessments, and vulnerability management. Proficient in administering and securing environments using HBSS, ACAS, and related tools while effectively communicating technical findings to stakeholders.

Highest-signal resume keywords

Active TS/SCI Security ClearanceCompTIA Security+ CertificationSystems Engineering ExperienceHBSS and ACAS AdministrationVulnerability Assessment and Remediation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

System Security EngineeringCybersecurity Risk AssessmentVulnerability ManagementSTIG ApplicationWindows Server AdministrationRed Hat Enterprise Linux AdministrationTechnical Security AssessmentCybersecurity Architecture SupportSCAP ScanningMcAfee Policy Development

Soft Skills

Effective CommunicationOrganizational SkillsTime ManagementInitiativeIndependent Work

Tools & Technologies

HBSSACASMcAfee ePolicy OrchestratorTenable SecurityCenterNessusVirtual Server AdministrationYUM Repository ManagementRogue System Detection

Certifications & Qualifications

CompTIA Security+

Industry Keywords

CybersecuritySecurity StandardsRisk ManagementComplianceInformation SystemsNetwork ArchitectureTechnical Solutions Documentation

Tech Stack

Tools & technologies

Cyber SecurityLinuxTypeScript

About the role

Key responsibilities & impact

Provide cybersecurity and security-engineering services for the National Military Command Center
Perform system security engineering, cybersecurity risk assessments, and security architecture support
Perform and review technical security assessments of computing environments
Identify system vulnerabilities, cybersecurity risks, and noncompliance with security standards and regulations
Develop and recommend mitigation strategies and corrective courses of action
Build, deploy, maintain, and patch HBSS Windows servers and ACAS Red Hat Enterprise Linux servers
Build, maintain, secure, and patch McAfee ePolicy Orchestrator, Tenable SecurityCenter, and Nessus servers
Create and manage SecurityCenter accounts for vulnerability managers conducting ACAS scans
Analyze ACAS scan results and support vulnerability remediation
Obtain and manage licenses and required HBSS and ACAS Kickstart ISO images
Build and administer virtual servers supporting cybersecurity operations
Deploy, configure, and patch McAfee modules through ePolicy Orchestrator
Develop and configure McAfee policies for supported environments
Apply STIGs and security benchmarks to operating systems, McAfee policies, and ACAS servers
Run SCAP scans on Windows and Red Hat Enterprise Linux servers
Update Red Hat Enterprise Linux RPM packages and maintain local YUM repositories for offline ACAS servers
Deploy Rogue System Detection sensors across applicable network subnets
Identify rogue subnets and endpoints and support remediation actions
Troubleshoot Tenable SecurityCenter and Nessus scanner issues
Document technical solutions, assessment results, cybersecurity risks, and recommended actions
Communicate complex technical findings to technical teams, government stakeholders, and leadership
Work independently and exercise sound judgment

Requirements

What you’ll need

Active TS/SCI security clearance
Current CompTIA Security+ certification
At least five years of relevant systems-engineering experience
Demonstrated understanding of systems engineering, including system design and architecture
Hands-on experience administering and securing HBSS, ACAS, ePO, Tenable SecurityCenter, or Nessus environments
Experience building, deploying, maintaining, and patching Windows and Red Hat Enterprise Linux servers
Experience applying STIGs and other cybersecurity benchmarks to operating systems, security tools, and enterprise environments
Ability to interpret vulnerability scan results and develop or implement appropriate remediation actions
Ability to identify cybersecurity risks across information-system and network architectures, including operating systems, hardware, and data-transfer protocols
Ability to work full-time onsite in the NMCC environment
One of the following education and experience combinations: bachelor's degree plus at least five years of relevant experience; master's degree plus at least three years of relevant experience; or no degree plus at least 12 years of intensive and progressive experience
Qualifying degree in computer science, information technology, cybersecurity, engineering, or a closely related discipline
Strong planning, organizational, prioritization, and time-management skills
Effective written, verbal, briefing, and presentation skills
Ability to communicate technical information effectively in formal and informal settings
Demonstrated initiative and ability to work independently

Benefits

Comp & perks

Generous PTO plus 11 federal holidays
401(k) retirement plan with company match and immediate vesting
Annual health and wellness allowance
Annual professional-development funding for education, training, certifications, and technology tools
Eight hours of paid volunteer time annually
Charitable-donation matching
Internal and external employee referral bonuses
Living Our Values recognition and bonus awards
Generous external referral bonuses
Ad hoc telework based on mission requirements and prior client approval