Senior Systems Administrator - Mission-Critical IC/DoD Ops

Koitecc Solutions; Tucson (AZ); Hybrid; USD 92,000 - 167,000; Full time

Job summary

Leidos seeks a Senior Systems Administrator/Help Desk Engineer to support the Chinook Agile software program for an Intelligence Community customer. You will ensure stability, security, and performance of Linux/Windows environments, supporting cloud and on-premises infrastructure while providing exceptional user service.

You’ll lead systems operations, automation, and modernization for geospatial analytics, software development, and data services in a fast-paced, classified setting.

Qualifications

• US citizenship is required per contract.
• Bachelor’s degree in a relevant field and 8–12 years of prior relevant experience or Master’s with 6–10 years of prior relevant experience.
• DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP).
• Experience with cloud platforms (AWS GovCloud, Azure Government) and hybrid cloud environments.
• Experience with Linux and Windows Server platform system administration.
• Proficiency with virtualization platforms (VMware, KVM) and management tools.
• Experience with automation and scripting (Ansible, Bash, PowerShell, Python).
• Familiarity with STIG compliance, system hardening, ACAS scans, and RMF processes.
• Strong understanding of enterprise networking, identity/access management, and storage concepts.
• Proven ability to troubleshoot, document, and lead systems-related projects independently.
• Experience supporting IC or DoD classified environments.

Responsibilities

• Lead system administration for Linux and Windows-based systems in secure, mission-critical environments.
• Diagnose and resolve hardware, software, and end-user technical issues while serving as a primary IT support contact and managing tickets through resolution.
• Architect and manage complex server, storage, and virtualization infrastructure (VMware, KVM).
• Perform OS installation, configuration, hardening, and patching in DoD STIG-compliant environments.
• Monitor and tune system performance, perform root-cause analyses, and resolve issues quickly.
• Support backup/recovery strategies, disaster recovery plans, and continuity of operations.
• Oversee and maintain automation scripts and infrastructure as code (Ansible, PowerShell, Bash, etc.).
• Maintain system documentation, configuration baselines, and support CM&R activities.
• Lead deployment of system enhancements and modernization for Chinook program.
• Collaborate with cybersecurity, network engineering, and software development teams to ensure compliance and performance.
• Participate in security audits, incident response, and operational readiness activities.

Skills

Linux administration

Windows administration

AWS GovCloud

Azure Government

VMware

KVM

PowerShell

Bash

Python

Ansible

Automation scripting

STIG/RMF compliance

DoD 8570 IAT II/III

Git

Jenkins

Docker

Education

Bachelor’s degree in Computer Science, Engineering, Information Technology

Tools

VMware

KVM

Ansible

PowerShell

Bash

Python

Git

Jenkins

Docker

Job description

Leidos seeks a Senior Systems Administrator/Help Desk Engineer to support the Chinook Agile software program for an Intelligence Community customer. You will ensure stability, security, and performance of Linux/Windows environments, supporting cloud and on-premises infrastructure while providing exceptional user service.

You’ll lead systems operations, automation, and modernization for geospatial analytics, software development, and data services in a fast-paced, classified setting.