Linux Administrator

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.