Lead Cyber Infrastructure Systems Administrator

Leidos seeks a Cyber Infrastructure Support Lead to oversee secure, resilient operations for complex, mission-critical IT environments. In this role, you will lead a small team supporting networks, servers, and cloud platforms, ensuring availability, performance, and cyber readiness for government and commercial clients. Responsibilities include incident response, problem resolution, security hardening, patching, and coordinating upgrades and migrations. You will collaborate closely with cyber, engineering, and operations teams, maintain documentation and SLAs, and mentor staff in a highly collaborative, mission-focused culture., * Lead day-to-day cyber infrastructure support operations for mission-critical systems

• Oversee monitoring, incident response, and troubleshooting across networks and cloud environments
• Implement security controls, hardening, and patch management aligned with best practices
• Coordinate with cybersecurity, engineering, and operations teams to resolve complex issues
• Develop and maintain runbooks, SOPs, and documentation for supported environments
• Provide technical guidance and mentoring to support engineers and analysts
• Support planning and execution of infrastructure upgrades and modernization efforts
• Ensure compliance with government and industry security standards and SLAs

• Cyber infrastructure operations
• Network administration (LAN/WAN, routing, switching)
• Linux/Windows server administration
• Cloud platforms (AWS, Azure, or similar)
• Security monitoring and incident response
• SIEM and log analysis tools
• Vulnerability management and patching
• Scripting/automation (Power
• Shell, Python, or similar)
• Configuration management and documentation
• Compliance with government/industry security standards