Cyber Network Defense Analyst

Description Leidos is seeking a Cyber Network Defense Analyst (CNDA) to join our team on a highly visible cyber security single-award IDIQ vehicle that provides Network Operations Security Center (NOSC) support, cyber analysis, application development, and a 24x7x365 support staff. T he Network Operations Security Center (NOSC) is a U.S. Government program responsible to monitor, detect, analyze, mitigate, and respond to cyber threats and adversarial activity on the enterprise. The NOSC has primary responsibility for monitoring and responding to security events and incidents detected at the Trusted Internet Connection (TIC) and Policy Enforcement Point (PEP) and is responsible for directing and coordinating detection and response activities performed by each Component SOC. Direction and coordination are achieved through a shared customer incident tracking system and other means of coordination and communication. The Monitoring and Analysis team provide 24x7 support across 4 different shifts. We have front half shifts (day and night) and back half shifts (day and night). The front half shift will work 12-hour shifts from Sunday•Tuesday and alternating Wednesdays. The back half shift will work 12-hour shifts from Thursday•Saturday and alternating Wednesdays. Candidates must have the ability to work non-core hours, if necessary. Duties include network security monitoring and detection, proactively searching for threats, inspecting traffic for anomalies and new malware patterns, investigating and analyzing logs, providing analysis and response to alerts, and documenting activity in NOSC investigations and Security Event Notifications (SENs).

Primary Responsibilities:

Manage and conduct hands-on technical detection, analysis, containment, eradication, and remediation as a member of the Incident Response team Guide and mentor peers and subordinates to provide cross training Ensure accountability and punctuality of security analysts assigned to your shift Capture cybersecurity metrics that support executive-level briefings (daily, weekly, monthly) Articulate daily challenges to the Government Watch Officer (GWO) Analyze web and host logs for indications of compromise Remediate and coordinate the remediation of infected or compromised devices Ensure shift continuity during call-outs and emergencies Compile incident reports, executive summaries, and analysis reports of intrusions and/or security events Document and update processes, workflows, and technical guides Perform simple firewall rule changes (after training)

Clearance Required:

Must have TS/SCI clearance to start. TS clearances candidates will be considered. Preference to candidates with current/active TS/SCI clearance. US Citizenship required

Basic Qualifications:

Candidates should also demonstrate the following: Bachelor's Degree and 2-4 years of SOC analyst experience. Additional experience may be considered in lieu of a degree Extensive knowledge of a SOC's/NOSC's purpose and role within an organization Detailed understanding of common network ports and protocols (e.g. TCP/UDP, HTTP, ICMP, DNS, SMTP, etc) Expertise with network topologies and network security device functions (e.g. Firewall, IDS/IPS, Proxy, DNS, etc). Expertise with packet analysis tools such as

Wireshark Certification Requirement :

Sec+, CEH, CySA+ or SANS certs 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:

March 16, 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:

Pay Range $69,550.00•$125,725.00 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. About Leidos 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 www.

Leidos.com . Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits . Securing Your Data Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system•never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com . If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission . Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.