System Administrator

Job Title: System Administrator

Company: Arch Systems LLC
Client: Internal Revenue Service (IRS)
Position Type: Full-Time
Location: Remote

Position Overview

Arch Systems is seeking a skilled System Administrator with at least 3 years of experience in Linux system administration, particularly Red Hat Enterprise Linux (RHEL) and OpenShift environments.

The selected candidate will be responsible for administering, maintaining, securing, and supporting yK1 production, test, development, and Mission Control server environments. This role requires hands-on experience in server administration, system monitoring, patching, vulnerability remediation, incident troubleshooting, and maintaining secure, highly available infrastructure in a federal government environment.

Key Responsibilities

• Administer, configure, maintain, and troubleshoot Red Hat Enterprise Linux (RHEL) 9/10 and OpenShift environments.
• Support production, test, development, and Mission Control server platforms.
• Perform system patching, upgrades, migrations, configuration changes, and vulnerability remediation.
• Monitor system health, availability, performance, and capacity to ensure platform stability.
• Troubleshoot system failures, technical incidents, and critical outages, providing timely resolution.
• Provide on-call support for critical system issues and operational emergencies.
• Implement and maintain backup, recovery, and system availability procedures.
• Manage server resources, system configurations, and performance optimization.
• Conduct security scans and remediate vulnerabilities in accordance with federal security requirements.
• Support FISMA compliance, NIST SP 800-53 security controls, and Plan of Action and Milestones (POA&M) remediation.
• Maintain accurate system documentation, configuration records, change requests, and the Computer Operators Handbook.
• Coordinate with database administrators, application developers, web administrators, and network teams to resolve infrastructure issues.
• Ensure secure handling and protection of sensitive government information, including FTI, PII, and SBU data.

Required Qualifications

• Minimum 3 years of professional experience in Linux system administration or enterprise server support.
• Hands-on experience administering Red Hat Enterprise Linux (RHEL) systems, preferably RHEL 9/10.
• Experience with Red Hat OpenShift or similar container-based platforms.
• Strong knowledge of Linux server installation, configuration, maintenance, patching, and troubleshooting.
• Experience with system monitoring, performance tuning, capacity planning, and resource management.
• Experience with vulnerability remediation, security hardening, and system compliance.
• Knowledge of backup and recovery procedures, incident management, and operational support.
• Ability to troubleshoot production issues and support mission-critical server environments.
• Strong technical documentation and communication skills.
• Ability to collaborate with cross-functional infrastructure and application support teams.

Security and Compliance Requirements

• Must meet applicable U.S. citizenship and federal tax compliance requirements for staff-like access.
• Must be able to successfully complete the required federal background investigation.
• Must meet HSPD-12/PIV credentialing requirements.
• Familiarity with FISMA Moderate, NIST SP 800-53, and IRS secure configuration requirements.
• Understanding of federal data protection requirements involving FTI, PII, and SBU information.

Preferred Qualifications

• Prior experience supporting the IRS or other U.S. federal government agencies.
• Experience maintaining mission-critical production infrastructure.
• Familiarity with federal cybersecurity compliance, security assessments, and POA&M remediation.
• Experience supporting enterprise container platforms and Linux-based infrastructure.
• Red Hat certifications such as RHCSA or RHCE are desirable but not mandatory.

Key Technical Skills

RHEL 9/10 | Red Hat OpenShift | Linux System Administration | Server Configuration | System Patching | Vulnerability Remediation | Security Hardening | System Monitoring | Performance Tuning | Capacity Planning | Backup & Recovery | Incident Management | Container Platforms | FISMA | NIST SP 800-53 | POA&M

Note: This position supports Task 7 – yK1 Systems Administration Support, including Mission Control and associated platform operations. No specific professional certification is mandated under the provided PWS requirements.