Leidos' Corporate Information Security Office (CISO) has an opening for a Cyber Infrastructure Support professional in our Omaha, NE office. This position will support the testing, implementation, deployment, maintenance, and administration of classified cyber systems, networks, and their supporting infrastructure hardware and software.

In this role you will perform hands-on systems administration and infrastructure support activities across Windows and Linux environments. Responsibilities include configuring and deploying hardware, installing and updating software, applying operating system and firmware updates, managing patches, implementing approved security configurations, troubleshooting technical issues, and maintaining accurate system documentation.

To be successful in this position, you must be able to work independently on moderately complex assignments while collaborating effectively with system administrators, cybersecurity personnel, engineers, program management, and other technical stakeholders. You should possess a strong technical foundation, demonstrate sound troubleshooting practices, and be willing to learn and support a broad range of infrastructure technologies within a classified, air-gapped environment.

Location: All work will be performed on-site in our Omaha, NE office.

Clearance: You must currently hold an active Secret clearance to qualify for consideration. You must also be eligible to obtain a Top Secret clearance post hire.

Primary Responsibilities

This role may include a combination of duties to maintain reliable, secure, and properly configured information systems and supporting infrastructure.

• Install, configure, maintain, and troubleshoot Windows and Linux servers, workstations, and supporting infrastructure components.
• Perform approved software installations, upgrades, updates, removals, and configuration changes.
• Support operating system and application patch management activities, including identifying applicable updates, coordinating testing, scheduling deployment, validating installation, and documenting completion.
• Install and validate firmware, driver, and hardware-management updates for servers, workstations, storage devices, network-connected equipment, and peripheral hardware.
• Support the secure transfer, validation, scanning, and installation of software and updates within classified or air-gapped environments.
• Configure and deploy new servers, workstations, peripheral devices, and other information technology equipment in accordance with approved build documentation and security requirements.
• Perform hardware installation, replacement, troubleshooting, repair coordination, and lifecycle support.
• Configure and administer Microsoft Windows Server operating systems and associated enterprise services.
• Support Microsoft Active Directory administration, including user and computer objects, organizational units, security groups, permissions, and related functions using Active Directory Users and Computers and other approved administrative tools.
• Assist with the development, testing, implementation, and troubleshooting of Group Policy Objects.
• Apply and validate Security Technical Implementation Guide requirements and other approved security configuration baselines.
• Use approved security and compliance tools to evaluate system configurations and identify potential vulnerabilities or configuration deficiencies.
• Coordinate with Information Assurance personnel to remediate security findings, configuration deficiencies, patching gaps, and vulnerability scan results.
• Support Red Hat Enterprise Linux systems, including installation, configuration, patching, service management, account administration, log review, and troubleshooting.
• Support virtual infrastructure hosted on VMware vSphere and ESXi platforms, including virtual machine deployment, resource allocation, snapshot management, operating system installation, and basic troubleshooting.
• Monitor system health, availability, performance, storage utilization, service status, and other operational indicators.
• Troubleshoot system outages, degraded performance, authentication issues, application failures, network connectivity problems, and other infrastructure incidents.
• Review system, application, security, and infrastructure logs to support troubleshooting, event analysis, and incident resolution.
• Assist with device discovery, operating system fingerprinting, service scanning, passive scanning, and other approved network or infrastructure assessment activities.
• Support enterprise cybersecurity and infrastructure tools used for endpoint protection, vulnerability management, compliance validation, logging, and monitoring.
• Create and maintain system documentation, including build procedures, configuration records, system diagrams, inventories, maintenance records, troubleshooting guides, and standard operating procedures.
• Document completed work, technical findings, configuration changes, patching activities, incidents, and corrective actions in approved ticketing or workflow systems.
• Participate in configuration management and change-control processes by preparing technical implementation details, testing results, validation steps, and rollback procedures.
• Maintain accurate hardware and software inventory information and update asset-management records following equipment deployment, transfer, replacement, or disposal.
• Support hardware and software refresh activities, including staging, configuration, deployment, data migration, validation, inventory updates, and equipment disposition.
• Assist senior technical staff with larger projects, complex troubleshooting efforts, infrastructure upgrades, system migrations, and technology-refresh initiatives.
• Coordinate with vendors, manufacturers, and other technical support personnel to resolve hardware, software, licensing, warranty, and compatibility issues.
• Support internal and external audits, assessments, inspections, inventory reviews, and security-validation activities by providing technical evidence and system documentation.
• Follow approved cybersecurity, configuration management, media handling, change control, and information system operating procedures.
• Identify recurring technical issues, supportability concerns, and opportunities to improve system reliability, security, standardization, and operational efficiency.

Basic Qualifications

• Bachelor’s degree and 2-4 years of prior relevant experience or a master’s degree with less than 2 years of prior relevant experience. Additional relevant experience may be considered in lieu of a degree.
• Must possess current DoD 8140 IAT II CompTIA Security+ certification or an equivalent certification that satisfies applicable position and customer requirements.
• Must hold current Secret clearance and be eligible to obtain Top Secret clearance.
• Hands-on experience supporting information technology infrastructure, systems administration, cybersecurity operations, or a related technical discipline.
• Experience working with Microsoft Windows desktop and server operating systems.
• Experience installing, configuring, updating, and troubleshooting software applications.
• Experience performing or supporting operating system, application, firmware, and driver updates.
• Experience configuring, deploying, maintaining, or troubleshooting computer hardware.
• Familiarity with patch-management processes, including testing, deployment, validation, exception handling, and documentation.
• Basic understanding of cybersecurity configuration standards, system hardening, vulnerability remediation, and secure administration practices.
• Ability to troubleshoot moderately complex technical issues using logs, diagnostic tools, documentation, and established technical practices.
• Ability to create and maintain clear, accurate technical documentation.
• Ability to communicate technical issues, findings, and recommended solutions to colleagues across multiple technical disciplines.
• Strong organizational, analytical, documentation, and problem-solving skills.
• Ability to work independently on assigned tasks while collaborating effectively with senior technical staff, Information Assurance personnel, engineers, and program leadership.

Relevant Experience Considered

Experience in one or more of the following areas:

• Systems administration
• Cyber infrastructure support
• Windows Server administration
• Windows workstation administration
• Red Hat Enterprise Linux administration
• Active Directory and Group Policy
• VMware vSphere or ESXi administration
• Server and workstation deployment
• Hardware configuration and troubleshooting
• Software installation and lifecycle support
• Operating system and application patching
• Firmware and driver maintenance
• Security configuration and system hardening
• Security Technical Implementation Guide implementation
• Vulnerability scanning and remediation
• Endpoint security and malware-protection tools
• System logging and monitoring
• Hardware and software inventory management
• Configuration management and change control
• Ticketing and workflow-management systems
• Backup, restoration, and recovery support
• Network connectivity and infrastructure troubleshooting
• Supporting classified information systems
• Supporting disconnected, isolated, or air-gapped environments

Preferred Qualifications

• Familiarity with Windows Server installation, configuration, maintenance, patching, and troubleshooting.
• Familiarity with Microsoft Active Directory and Active Directory Users and Computers.
• Familiarity with Group Policy concepts and the application of security and configuration settings through Group Policy Objects.
• Familiarity with Red Hat Enterprise Linux or a comparable Linux operating system.
• Familiarity with VMware vSphere and ESXi virtualization technologies.
• Familiarity with Security Technical Implementation Guides or comparable security configuration baselines.
• Familiarity with Kubernetes architecture, administration, or application deployment.
• Familiarity with containerization concepts and container lifecycle management.
• Familiarity with container images, registries, orchestration, persistent storage, networking, and security considerations.
• Familiarity with infrastructure automation, scripting, or configuration-management technologies.
• Previous experience supporting classified, disconnected, or air-gapped information systems.
• Experience administering or supporting Red Hat Enterprise Linux systems.
• Experience with VMware vSphere, ESXi, or comparable virtualization platforms.
• Experience creating, modifying, testing, or troubleshooting Group Policy Objects.
• Experience implementing or assessing systems against Security Technical Implementation Guides.
• Experience using SCAP Compliance Checker or comparable security compliance-assessment tools.
• Experience with Trellix endpoint security, application control, device control, or related enterprise security products.
• Experience using Splunk or a comparable centralized logging and analysis platform.
• Experience using enterprise ticketing or workflow software such as Jira, ServiceNow, or a comparable platform.
• Experience using Podman, Docker, or comparable container-management technologies.
• Basic familiarity with Microsoft Azure services, administration, or cloud architecture.
• Basic familiarity with Amazon Elastic Kubernetes Service or other managed Kubernetes platforms.
• Additional relevant technical or cybersecurity certifications such as CompTIA Network+, Linux+, CySA+, Microsoft, Red Hat, VMware, Cisco, Kubernetes, or similar credentials.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

Pay Range:

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.