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

Assurance Technology Corporation (ATC); Alexandria (VA); On-site; USD 140,000 - 190,000; Full time

Job summary

Assurance Technology Corporation (ATC) in Alexandria, VA seeks a highly experienced Senior RHEL Administrator to lead enterprise-level Linux administration, security, and support for mission-critical environments. The role emphasizes DISA STIGs, RMF, and DoD/DON cybersecurity standards in classified contexts.

You will mentor junior staff, guide technical teams, and collaborate with program managers to deliver innovative, secure solutions within government-focused projects.

Qualifications

• Active TS/SCI clearance with polygraph eligibility.
• 15+ years Linux system administration, 10+ years in RHEL.
• Strong enterprise RHEL knowledge incl. clustering, storage, networking, virtualization.
• Hands-on Ansible or similar automation tools.
• Deep experience with system hardening, auditing, and compliance frameworks (DISA STIGs, NIST, RMF).
• Scripting experience in Bash, Python, or Perl.
• Experience with classified government defense programs.
• Excellent communication and documentation skills.

Responsibilities

• Administer, configure, secure, and optimize RHEL systems across physical and virtual environments.
• Perform hardening, patch management, vulnerability remediation per DISA STIGs, RMF, and US cyber directives.
• Design, implement, and maintain HA and resilient RHEL infrastructures.
• Manage authentication/authorization with LDAP, AD, and Kerberos.
• Provide advanced troubleshooting and root cause analysis.
• Support Docker/Podman and virtualization (VMware, KVM, Hyper‑V).
• Automate tasks with Ansible, Bash, and Python.
• Collaborate with cybersecurity teams to maintain compliance.
• Document architecture, procedures, change management.
• Mentor junior admins and provide technical leadership.

Skills

RHEL expertise

Linux system administration

Automation with Ansible

Scripting (Bash/Python/Perl)

Security/compliance (DISA STIGs, RMF)

Leadership / mentoring

Tools

Docker

Podman

VMware

KVM

Hyper-V

Ansible

Job description

• US Citizenship required
• US Government Security Clearance required

Assurance Technology Corporation, ATC is seeking 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.