Senior Red Hat Enterprise Linux (RHEL) Administrator Alexandria, VA

Assurance-Technology-Corporation-; Alexandria (VA); On-site; USD 150,000 - 210,000; Full time

Job summary

Assurance Technology Corporation is seeking a highly experienced Senior RHEL Administrator to provide enterprise-level administration, security, and support for mission-critical Linux environments in Alexandria, VA. A TS/SCI clearance and DoD cybersecurity familiarity are required.

The successful candidate will lead Linux operations, automate tasks with Ansible, and collaborate with cybersecurity teams to ensure compliance with government standards, while mentoring junior staff and supporting

Qualifications

• 15+ years of Linux system administration experience, with 10+ years on RHEL.
• Strong knowledge of clustering, storage, networking, and virtualization in RHEL environments.
• Hands-on automation experience using Ansible or similar tools.
• Deep expertise in system hardening, auditing, and compliance frameworks (DISA STIGs, NIST, RMF).
• Experience supporting classified government/defense programs.
• Excellent communication and documentation skills.

Responsibilities

• Administer, configure, secure, and optimize RHEL across physical and virtual environments.
• Perform system hardening, patch management, and vulnerability remediation per DISA STIGs, RMF, and US directives.
• Design, implement, and maintain highly available RHEL infrastructures for mission-critical workloads.
• Manage authentication and access with LDAP/Active Directory integration and Kerberos.
• Provide advanced troubleshooting and root cause analysis for complex system issues.
• Support containerization (Docker/Podman) and virtualization (VMware, KVM, Hyper-V).
• Automate tasks and workflows using Ansible, Bash, and Python.
• Collaborate with cybersecurity teams to maintain security policy compliance, audits, and incident response.
• Document system architecture, procedures, and change management processes.
• Mentor junior administrators and provide technical leadership.

Job description

Home Find a Job Senior Red Hat Enterprise Linux (RHEL) Administrator Alexandria, VA

• US Government Security Clearance required

• US Citizenship required
• US Government Security Clearance required

Assurance Technology Corporation, ATC isseeking a highly experienced Senior RHEL Administrator to provide enterprise-level administration, security, and support for mission-critical Linux environments. The ideal candidate will have extensive expertise in Red Hat Enterprise Linux, demonstrated success in architecting and managing secure infrastructures, and the ability to ensure compliance with stringent government and DoD/DON cybersecurity standards. This position requires a proven leader with the ability to guide technical teams, collaborate with program managers, and deliver innovative solutions within classified environments.

Key Responsibilities

• Administer, configure, secure, and optimize Red Hat Enterprise Linux systems across physical and virtual environments.
• Perform system hardening, patch management, and vulnerability remediation in alignment with DISA STIGs, DoD RMF, and US CYBERCOM directives.
• Design, implement, and maintain highly available and resilient RHEL infrastructures supporting mission-critical workloads.
• Manage authentication, authorization, and access control with LDAP, Active Directory integration, and Kerberos.
• Provide advanced troubleshooting and root cause analysis for complex system, application, and network issues.
• Support containerization (Docker, Podman) and virtualization platforms (VMware, KVM, Hyper-V).
• Automate tasks and workflows using Ansible, Bash, and Python.
• Collaborate with cybersecurity teams to maintain compliance with security policies, audits, and incident response.
• Document system architecture, procedures, and change management processes.
• Mentor junior administrators and provide technical leadership within the team.

Required Qualifications

• Active TS/SCI security clearance with ability to pass a polygraph.
• 15+ years of experience in Linux system administration, with at least 10 years specializing in RHEL.
• Strong knowledge of enterprise RHEL environments, including clustering, storage, networking, and virtualization.
• Hands-on experience with Ansible or equivalent automation/configuration management tools.
• In-depth knowledge of system hardening, auditing, and compliance frameworks (DISA STIGs, NIST, RMF).
• Strong background in scripting (Bash, Python, or Perl).
• Experience supporting classified government or defense programs.
• Excellent communication and documentation skills.

Preferred Qualifications

• Red Hat Certified Engineer (RHCE) or Red Hat Certified Architect (RHCA).
• Experience with cloud environments (AWS, Azure, OpenStack) in secure contexts.
• Familiarity with DevSecOps pipelines and CI/CD tools.
• Previous leadership or team lead experience.

Work Environment

• Onsite within a secure government facility.
• Collaborative, fast-paced environment supporting high-priority national security missions.

Equal Opportunity Employer – vets, disability

Will require the ability to obtain a TS/SCI with Poly US Government Security Clearance