Cybersecurity Infrastructure Analyst

Leidos is seeking a Cyber Infrastructure Support professional to ensure the resilience of mission-critical systems for government and commercial clients. In this role, you will monitor and support networks, servers, and security tools, investigating incidents and applying hardening, patching, and configuration baselines. You’ll collaborate with cross-functional teams to improve reliability and cyber posture, maintain documentation and runbooks, and support 24x7 operations as needed. Join a mission-driven, learning-focused environment with flexible work options and impactful national security and critical infrastructure projects., * Monitor and support critical cyber and IT infrastructure for availability, performance, and security.

• Investigate, triage, and resolve security and operational incidents within defined SLAs.
• Implement hardening, patching, and configuration baselines across servers, networks, and endpoints.
• Maintain and tune monitoring, logging, and SIEM tools to improve threat detection.
• Collaborate with engineers, analysts, and stakeholders to support mission-critical programs.
• Create and maintain technical documentation, runbooks, and system diagrams.
• Support change management activities, including testing and deployment of infrastructure changes.
• Participate in on-call or shift coverage for 24x7 operations as needed.

• Cybersecurity operations
• Network infrastructure support
• Linux/Windows administration
• SIEM tools (e.g., Splunk)
• Incident detection and response
• Vulnerability assessment
• Firewalls and IDS/IPSScripting/automation (Python, Power
• Shell)
• Cloud security (AWS/Azure)
• Documentation and reporting