Systems Administrator with Security Clearance

Position Overview
We are seeking a skilled Systems Administrator to support and maintain mission-critical Linux and Windows environments within a secure, classified setting. This role is responsible for administering enterprise server infrastructure, virtualization platforms, storage systems, and security controls while ensuring high availability, performance, and compliance with cybersecurity requirements. The ideal candidate is a hands-on Linux administrator with experience building and configuring systems from the ground up, managing VMware environments, supporting enterprise storage solutions, and maintaining secure computing environments.

Key Responsibilities

• Administer and maintain Linux and Windows server environments.
• Configure, manage, and troubleshoot Red Hat Enterprise Linux (RHEL) systems.
• Deploy and support VMware infrastructure, including ESXi hosts and virtual machines.
• Manage enterprise NAS storage platforms, including provisioning, monitoring, maintenance, and performance optimization.
• Configure and maintain DNS services, SSH authentication, file access policies, and system security controls.
• Create, modify, and manage user accounts, permissions, and security groups within Active Directory environments.
• Implement operating system patches, upgrades, vulnerability remediation, and system hardening activities.
• Provide backup, recovery, disaster recovery, and storage management support.
• Monitor system health, resource utilization, and performance metrics across multiple environments.
• Maintain cybersecurity compliance in accordance with applicable security standards and customer requirements.
• Support security audits, logging, and incident response activities.
• Collaborate with network engineers, software engineers, cybersecurity personnel, and project teams to resolve technical issues and improve system reliability.
• Develop and maintain technical documentation, system procedures, and configuration baselines.
• Support after-hours maintenance windows and operational requirements as needed. Required Qualifications
• Bachelor's degree and at least 5 years of IT experience, or equivalent combination of education and experience.
• Active Top Secret security clearance with SCI eligibility.
• Adjudicated Full Scope Polygraph.
• Strong Linux administration experience, preferably with Red Hat Enterprise Linux (RHEL).
• Experience configuring servers from the ground up, including DNS, SSH keys, user access controls, and security policies.
• Experience administering VMware environments, including ESXi.
• Experience managing enterprise storage solutions and NAS platforms.
• Experience supporting Windows Server and Active Directory environments.
• Familiarity with Group Policy (GPO) administration.
• DoD 8570 IAT Level II certification, such as Security+, or the ability to obtain one within six months of hire.
• Ability to work onsite in a secure facility.
• Ability to lift equipment up to 40 pounds.

Preferred Qualifications

• 6+ years of Red Hat Enterprise Linux administration experience.
• Experience with NetApp storage platforms and ONTAP.
• Experience operating within highly regulated or classified environments.
• Knowledge of RMF, STIG requirements, system hardening, and vulnerability remediation.
• Experience with identity management and single sign-on solutions.
• Familiarity with enterprise storage architectures and RAID technologies.
• Experience implementing and managing host-based firewalls such as iptables.
• Strong technical documentation and knowledge-sharing skills. Technical Environment
• Red Hat Enterprise Linux (RHEL)
• Windows Server
• VMware ESXi
• Active Directory
• Group Policy (GPO)
• DNS
• SSH
• NetApp ONTAP
• NAS Storage
• Security Hardening
• RMF/STIG Compliance Work Environment

This position is 100% onsite within a secure classified facility. Candidates must be comfortable working in a highly regulated environment supporting critical infrastructure and mission-focused operations.