Cyber Security Analyst

Leidos; Fort Belvoir (VA); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos is seeking a Cyber Security Analyst to support the DoDIN defense from the Fort Belvoir SOC, performing continuous monitoring, incident response, and vulnerability management across on‑prem and cloud environments.

You will investigate threats, coordinate investigations, and prepare actionable reports while collaborating with DoD cyber professionals. U.S. citizenship with an active TS/SCI clearance and baseline Security+ CE/CSSP-Infra are required.

Qualifications

• Bachelor's degree and 4–8 years of relevant cybersecurity experience.
• Hands-on experience using an enterprise 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.
• Baseline certification (Security+ CE) and CSSP-Infrastructure Support certification at start.
• U.S. citizenship with an active TS/SCI clearance with SAP Eligibility.

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.

Skills

SIEM

Incident response

Threat analysis

Network forensics

Education

Bachelor's degree

Tools

NetFlow

Packet capture

Job description

Description

Ready to take your cybersecurity experience beyond routine alert monitoring?

Leidos Enterprise & Cyber Solutions Defense is seeking a Cyber Security Analyst to support the C5ISR 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.

Location: Fort Belvoir, VA

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.

• 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 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:

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:

Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline onlyand 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 [e-mail].

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.