Cyber Security Analyst

Ready to take your cybersecurity experience beyond routine alert monitoring?

Leidos Enterprise & Cyber Solutions Defense is seeking a Cyber Security Analyst to support the C5

ISR Defensive Cyber Solutions Branch (DCSB) and help protect critical Department of Defense networks, systems, and data from sophisticated cyber threats. You'll join a high-visibility Security Operations Center (SOC) providing 24x7x365 defensive cyber operations, including continuous monitoring, threat detection, incident response, and vulnerability management.

Our team protects a diverse, multi-tenant environment spanning on-premises infrastructure and leading cloud platforms, including AWS, Microsoft Azure, Google Cloud Platform (GCP), Oracle Cloud, and SaaS environments. If you thrive on investigating complex threats, analyzing network activity, and working alongside experienced cyber professionals to defend critical missions, we want to hear from you.

Fort Belvoir, VA

U.S. Citizenship with an active TS/SCI with SAP Eligibility

Baseline certification (Security+ CE) and CSSP-Infrastructure Support

• Lead and coordinate investigations throughout the Incident Response lifecycle, from initial detection through remediation.
• Correlate and analyze security events, alerts, logs, and network data to determine the scope and impact of cyber incidents.
• Acquire and analyze endpoint and network artifacts, including Net Flow and full packet capture, to identify malicious or suspicious activity.
• Identify attacker tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) to strengthen detection and response capabilities.
• Tune and maintain SIEM and IDS technologies to reduce false positives and improve SOC detection effectiveness.
• Develop and maintain Incident Response processes, procedures, workflows, and playbooks.
• Document investigations and response actions in case management systems and prepare clear, actionable incident reports.
• Collaborate with cyber professionals in a fast-paced operational environment to defend the DoD Information Network (DoDIN) against sophisticated threats and advanced persistent threat (APT) actors.

• Bachelor's degree and 4-8 years of relevant cybersecurity experience.
• Hands-on experience using an enterprise Security Information and Event Management (SIEM) platform.
• Experience analyzing high volumes of security logs and network data, including Net Flow and/or full packet capture.
• Experience with network traffic and packet analysis.
• Strong understanding of TCP/IP, common ports and protocols, network traffic flows, the OSI model, system administration, defense-in-depth, and network security technologies.
• Understanding of cloud security concepts and considerations.
• Familiarity with Unix-based systems.
• Ability to work effectively in a collaborative, mission-focused SOC environment.
• Baseline certification (Security+ CE) and CSSP-Infrastructure Support certification at start.
• U.S. citizenship with an active TS/SCI clearance with SAP Eligibility.

• Cybersecurity experience across Protect, Detect, Respond, and Sustain functions within a Computer Incident Response or Security Operations organization.
• Experience working in a 24x7 SOC or cyber operations environment.
• Understanding of the cyber threat lifecycle, attack vectors, exploitation techniques, and adversary behavior.
• Familiarity with intelligence-driven defense, Cyber Kill Chain methodology, and/or related threat frameworks.
• Experience analyzing advanced attacker TTPs and indicators of compromise.
• Strong written and verbal communication skills, including the ability to translate complex technical findings into clear, actionable reports.
• A proactive, self-motivated approach with the ability to perform effectively in a fast-paced operational environment.

This role gives you the opportunity to investigate real-world cyber activity, work with enterprise-scale security data and technologies, and directly strengthen defensive cyber capabilities.

At Leidos, you'll work alongside a mission-focused team helping protect the digital infrastructure behind critical national security operations.

August 25, 2026

For U.S. Positions:
While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range $87,100.00 - $

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the…