Linux Administrator

Fort Belvoir, VA

Job Title: Linux Administrator
Location: Fort Belvoir, VA
Type: Direct Hire
Contractor Work Model: Onsite
Security Clearance: Active Secret Clearance Required

Responsibilities

  • Support, maintain, and enhance Linux-based systems and services that enable Identity, Credential, and Access Management (ICAM) functions across the enterprise.
  • Manage, configure, and maintain Linux servers (RHEL/Oracle Linux/Ubuntu or distributions in use). Perform patching, vulnerability remediation, system hardening, and lifecycle management.
  • Monitor system performance, health, and capacity to ensure optimal operations.
  • Support ICAM tools and services such as IAM directories, federation services, PKI components, privileged access systems, connectors, and agent-based integrations.
  • Ensure secure configuration and uptime for ICAM-related applications hosted on Linux.
  • Implement and maintain security baselines (DISA STIGs, CIS Benchmarks, internal policies). Assist with audit requests, logs, identity access reviews, and compliance reporting.
  • Manage certificates, key stores, and cryptographic components supporting ICAM services.
  • Develop scripts (Bash, Python, Ansible) to automate administrative tasks and deployments.
  • Support CI/CD or DevOps workflows used for ICAM platform updates or configuration changes.
  • Troubleshoot OS-level and application-level issues.
  • Participate in on-call rotations for high-severity ICAM service events and conduct root cause analysis to implement permanent fixes.
  • Collaborate with ICAM architects, cybersecurity, network teams, and application teams to support project deliverables, migrations, and environment buildouts.
Requirements
  • Active Secret Clearance required.
  • Possession of Security+ or equivalent.
  • Strong knowledge of Linux administration (system services, networking, storage, SELinux, etc.).
  • Experience with identity or security services (LDAP, SSO, federation, certificates, PAM, SSSD).
  • Familiarity with logging platforms (Splunk, ELK) and monitoring tools.
  • Scripting experience (Bash, Python, Ansible).
  • Understanding of IAM concepts: authentication, authorization, identity lifecycle, RBAC, MFA.
  • Knowledge of security hardening and compliance frameworks.

Type: Direct-Hire

Experience: 0

Category: Information Technology

Contractor Work Model: Onsite

Brand: System One

Shift: On-Site

Job ID: 348477

Date Posted: 03/30/2026

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