Lead Systems Administrator – Linux/Windows

Jobtailor; Arlington (VA); On-site; USD 110,000 - 150,000; Full time

Job summary

Jobtailor is seeking an experienced IT Systems Administrator to support on-prem Linux/Windows environments and VMware vSphere across multiple datacenters. The role includes Tier III incident handling, performance tuning, and automation scripting to streamline daily operations.

You will work with DoD-level security requirements, STIGs/RMF, and containerization using Docker/Podman and Ansible. A TS eligibility and STEM degree are preferred for this senior position in Arlington, VA.

Qualifications

• Bachelor’s degree in a STEM discipline (or additional years of relevant experience considered in lieu of degree)
• 8-10 years of IT Systems Administration that includes 3-5 years of Linux administration
• DoD 8140 IAT Level II cert (e.g., Security+ CE or equivalent)
• Experience designing and maintaining secure, scalable cloud/on-prem platforms (IL5–IL6+)
• Knowledge of STIGs, RMF, and DoD cybersecurity standards
• Knowledge of containerization (Docker/Podman), Ansible for automation, and OpenLDAP
• Experience with virtualization (VMware)
• Strong CLI and Bash scripting experience

Responsibilities

• Support on-premises Linux (60%) and Windows (40%) infrastructure and applications.
• Support on-premises vSphere infrastructure across multiple datacenters.
• Provide Tier III support for production and development environments, managing ticket submission and tracking.
• Monitor resource availability to meet customer requirements, ensuring sufficient hardware, software, and throughput.
• Review and optimize system performance to ensure peak efficiency and reliability for mission-critical applications
• Analyze system resource usage and apply corrective actions when necessary
• Review system and application logs, ensuring completion of scheduled tasks and backups
• Create and manage user accounts, groups, and permissions; maintain local repositories in a Linux-based environment
• Support on-prem and remote Linux-based Oracle database appliances
• Develop and maintain administrative bash scripts for system maintenance and automation
• Proficient in DNS administration
• Document and implement system administration solutions to meet business requirements

Skills

Linux administration

Bash scripting

CLI proficiency

System monitoring

Incident response

Education

Bachelor’s degree in STEM

Tools

VMware

OpenLDAP

Docker/Podman

Ansible

Job description

Responsibilities

• Support on-premises Linux (60%) and Windows (40%) infrastructure and applications.
• Support on-premises vSphere infrastructure across multiple datacenters.
• Provide Tier III support for production and development environments, managing ticket submission and tracking.
• Monitor resource availability to meet customer requirements, ensuring sufficient hardware, software, and throughput.
• Review and optimize system performance to ensure peak efficiency and reliability for mission-critical applications
• Analyze system resource usage and apply corrective actions when necessary
• Review system and application logs, ensuring completion of scheduled tasks and backups
• Create and manage user accounts, groups, and permissions; maintain local repositories in a Linux-based environment
• Support on-prem and remote Linux-based Oracle database appliances
• Develop and maintain administrative bash scripts for system maintenance and automation
• Proficient in DNS administration
• Document and implement system administration solutions to meet business requirements

Requirements

• Active TOP SECRET clearance with SCI eligibility required
• Bachelor’s degree in a STEM discipline (or additional years of relevant experience considered in lieu of degree)
• 8-10 years of IT Systems Administration that includes 3-5 years of Linux administration
• DoD 8140 IAT Level II cert (e.g., Security+ CE or equivalent)
• Experience designing and maintaining secure, scalable cloud/on-prem platforms (IL5–IL6+)
• Knowledge of STIGs, RMF, and DoD cybersecurity standards
• Knowledge of containerization (Docker/Podman), Ansible for automation, and OpenLDAP
• Experience with virtualization (VMware)
• Strong CLI and Bash scripting experience