Senior Red Hat Linux Administrator

About the role

This role provides advanced engineering, operations, and automation support across Red Hat Enterprise Linux (RHEL), multi cloud ACI environments (AWS, Azure, GCP), container platforms (OpenShift, Kubernetes, EKS), and DIS enterprise services including Internet Messaging, DNS, and security driven infrastructure operations.

Responsibilities

• Administer, harden, and optimize Red Hat Enterprise Linux (RHEL 7/8/9+) systems for DIS operational environments.
• Build and maintain Ansible/Tower/AAP automation for OS configuration, patching, deployments, network/storage tasks, and cloud infrastructure provisioning.
• Operate and support DIS Internet Messaging platforms (Sendmail/Postfix, SMTP Auth, LDAP sync), including YAML/Ansible based server provisioning and Splunk log/report automation.
• Manage UNIX/BIND DNS zones, automate zone maintenance, integrate with AD DNS, and ensure compliance with SSA security and change management processes.
• Support and operate OpenShift, Kubernetes, and Amazon EKS clusters, including deployment of OCI compliant base images, namespace administration, and containerized application support.
• Provide multi cloud ACI operations across AWS, Azure, and GCP—compute, storage, networking, AMIs, IAM, encryption, monitoring, and DR/failover design.
• Implement and support security operations including ATO documentation, POA&M tracking, continuous monitoring, vulnerability scanning, intrusion detection, event logging, and incident response.
• Maintain Red Hat Satellite for patching, inventory, and configuration compliance.
• Support virtualization infrastructure including VMware ESXi, vCenter, Horizon/VCF/Aria, Dell/EMC platforms, SAN administration, and backup/restore technologies.
• Produce and maintain engineering documentation, runbooks, system architecture references, and CAPRS/ServiceNow problem and change records.
• Participate in 24x7 on call rotations, respond to incidents within required SLAs, and support weekend/off hour maintenance windows.

Requirements

• 7+ years administering RHEL 7/8/9+ including installation, configuration, optimization, security hardening, and backup/recovery.
• 7+ years troubleshooting performance issues (CPU, memory, I/O, networking).
• 5+ years supporting virtualized environments (VMware ESXi/vCenter/VCF/Aria, KVM).
• 5+ years developing automation using Ansible, Ansible Tower/AAP, Bash, Python, or Perl.
• Expertise in Linux command line operations and enterprise level troubleshooting.
• Strong communication and documentation skills.
• 5 years of experience working Virtual Platforms
• 5 years of experience working with Ansible Playbooks
• 3 years of experience with scripting languages for automation tasks and deployments (e.g., Bash Shell and Python)
• Expertise in the Linux command line environment
• Excellent interpersonal and communication skills
• Deep experience with RHEL tools including Ansible, Satellite, CoreOS, OCI image creation, and automation pipelines.
• Hands on experience supporting Kubernetes/OpenShift/EKS clusters.
• Advanced experience supporting AWS/Azure/GCP including compute, networking, IAM, encryption, DR/failover.
• Experience managing Internet Messaging (Sendmail/Postfix, LDAP, SMTP Auth), Splunk, and YAML/Ansible provisioning.
• Experience supporting UNIX/BIND DNS in multi platform environments.
• Strong knowledge of federal security requirements including ATO, POA&M, continuous monitoring, vuln scanning, IDS/IPS, and CAPRS/ServiceNow workflows.
• Experience automating cloud, server, network, and storage operations at enterprise scale.
• Resource is expected to work onsite 5 days a week at our customer location.

Qualifications

• 7+ years administering RHEL 7/8/9+ including installation, configuration, optimization, security hardening, and backup/recovery.
• 7+ years troubleshooting performance issues (CPU, memory, I/O, networking).
• 5+ years supporting virtualized environments (VMware ESXi/vCenter/VCF/Aria, KVM).
• 5+ years developing automation using Ansible, Ansible Tower/AAP, Bash, Python, or Perl.
• Expertise in Linux command line operations and enterprise level troubleshooting.
• Strong communication and documentation skills.
• 5 years of experience working Virtual Platforms
• 5 years of experience working with Ansible Playbooks
• 3 years of experience with scripting languages for automation tasks and deployments (e.g., Bash Shell and Python)
• Expertise in the Linux command line environment
• Excellent interpersonal and communication skills
• Deep experience with RHEL tools including Ansible, Satellite, CoreOS, OCI image creation, and automation pipelines.
• Hands on experience supporting Kubernetes/OpenShift/EKS clusters.
• Advanced experience supporting AWS/Azure/GCP including compute, networking, IAM, encryption, DR/failover.
• Experience managing Internet Messaging (Sendmail/Postfix, LDAP, SMTP Auth), Splunk, and YAML/Ansible provisioning.
• Experience supporting UNIX/BIND DNS in multi platform environments.
• Strong knowledge of federal security requirements including ATO, POA&M, continuous monitoring, vuln scanning, IDS/IPS, and CAPRS/ServiceNow workflows.
• Experience automating cloud, server, network, and storage operations at enterprise scale.
• Resource is expected to work onsite 5 days a week at our customer location.

Skills

• Experience supporting DIS mission critical systems.
• Experience with CI/CD tooling (Jenkins) and Git/Bitbucket.
• Federal government experience.
• Strong ability to operate independently and document complex processes.
• Experience with SAN technologies, backup/restore tools, and hybrid messaging integrations.
• Ability to collaborate with cross functional technical teams.
• Adept at working independently, but also in a team environment.
• Demonstrated experience delivering technology solutions in a fast paced, deadline driven enterprise environment.
• Experienced in developing and maintaining Red Hat Ansible Playbooks.

Benefits

Competitive compensation
Comprehensive insurance options
Matching contributions through the 401(k) plan and the share purchase plan
Paid time off for vacation, holidays, and sick time
Paid parental leave
Learning opportunities and tuition assistance
Wellness and Well being programs