Systems Administrator/Helpdesk Engineer

Leidos is hiring a mid-level Systems Administrator / Helpdesk Engineer to support the Chinook Program for an Intelligence Community customer. This onsite role in St. Louis, MO includes Tier 1 and Tier 2 helpdesk service, Windows and Linux system administration, infrastructure support, and documentation work within a cleared environment.

Key Responsibilities

• Deliver Tier 1 and Tier 2 helpdesk support to resolve hardware, software, network, and system issues in a timely manner.
• Install, configure, maintain, and troubleshoot Windows and Linux workstations and servers.
• Manage user accounts, permissions, and access controls using Active Directory and related identity management tools.
• Monitor system performance, proactively identify issues, and apply corrective actions to help maintain system availability.
• Install software updates, security patches, and operating system upgrades according to program and customer requirements.
• Document incidents, service requests, troubleshooting steps, and system changes using established ticketing systems.
• Coordinate with systems engineers, cybersecurity personnel, and network administrators to resolve complex technical problems.
• Support system backups, disaster recovery activities, and configuration management processes.
• Assist with workstation deployments, hardware refreshes, asset management, and inventory tracking.
• Participate in on-call support and scheduled maintenance activities as required.
• Maintain automation scripts and infrastructure as code using tools such as Ansible, PowerShell, and Bash.
• Maintain system documentation, configuration baselines, and support CM and RM activities.
• Participate in security audits, incident response, and operational readiness activities.
• Contribute to continuous process improvements to enhance customer experience and operational efficiency.

Required Qualifications

• Active Top Secret/SCI eligibility with the ability to pass a Polygraph examination.
• US citizenship required per contract.
• Bachelor’s degree in Computer Science, Engineering, Information Technology, or related discipline, and 4-8 years of prior relevant experience, or Master’s with 2-6 years of prior relevant experience. Experience may be substituted for degree requirements.
• DoD 8570 IAT Level II or III certification (examples include Security+ CE, CASP+, CISSP).
• Experience with cloud platforms including AWS GovCloud and Azure Government, including hybrid cloud environments.
• Experience with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server system administration.
• Experience with virtualization platforms and management tools including VMware and KVM.
• Experience with automation and scripting using Ansible, Bash, PowerShell, or Python.
• Familiarity with STIG compliance, system hardening, ACAS scans, and RMF processes.
• Strong understanding of enterprise networking, identity and access management, and storage concepts.
• Proven ability to troubleshoot, document, and independently lead systems-related projects.
• Experience supporting IC or DoD classified environments.

Technologies

• Active Directory
• Ansible
• PowerShell
• Bash
• Python
• Windows
• Linux
• Red Hat Enterprise Linux
• CentOS
• Windows Server
• VMware
• KVM
• AWS GovCloud
• Azure Government
• STIG compliance
• ACAS
• RMF

Preferred Qualifications

• Experience supporting an Intelligence Community customer or GEOINT missions.
• Familiarity with DevOps tools and pipelines (for example, Git, Jenkins, Docker).
• Knowledge of enterprise backup solutions, DNS, DHCP, Active Directory, and PKI.
• Strong troubleshooting and root cause analysis capabilities.
• Ability to work independently while collaborating effectively across technical teams.
• Strong organizational skills with attention to detail and documentation.
• Adaptability and willingness to learn new technologies in a dynamic environment.

Work Schedule and Shift Coverage

• Candidate must commit to covering the morning shift starting at 6 AM EST or covering the evening shift working until 10 PM EST.

Location

St. Louis, MO (onsite)

Additional locations where the position may be performed:

• Gaithersburg, MD (program’s primary work location)
• Alexandria, VA
• Chantilly, VA
• Englewood, CO
• St. Louis, MO
• Tucson, AZ

Compensation

• Pay Range: USD 73,450 - 132,775 per year

Benefits

• Competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Posting Information

Original posting date: September 16, 2026