Ready to take your cybersecurity experience beyond routine alert monitoring?
Leidos is seeking a Cyber Security Analyst to support the C5ISR Defensive Cyber Solutions Branch (DCSB) and help protect critical Department of War 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.
Location: Hybrid - 3 days on site at Adelphi, MD
Schedule: Full Time | Day Shift: 6:00 am to 2:00 p.m.
Clearance: U.S. Citizenship with an active TS/SCI with SAP Eligibility
Required Certifications: Baseline certification (Security+ CE) and CSSP-Infrastructure Support
Primary Responsibilities:
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 NetFlow 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.
Basic Qualifications:
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 NetFlow 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.
Ability to work the 6:00 am to 2:00 p.m day shift.
Baseline certification (Security+ CE) and CSSP-Infrastructure Support certification at start.
U.S. citizenship with an active TS/SCI clearance with SAP Eligibility.
Preferred Qualifications: You don't need to check every box below. We'd especially like to hear from candidates with experience in one or more of the following areas:
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.
Your Impact
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.
If you're ready to bring your cybersecurity expertise to a mission that matters, apply today.
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.
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 - $157,450.00
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.
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health. The company's global workforce of 48,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $15.4 billion for the fiscal year ended December 29, 2023.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
Your most important work is ahead, visit careers.leidos.com for our latest opportunities.
