Cyber Security Analyst

Leidos Inc; Arlington (VA); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos Inc. in the Washington DC Area is seeking a Cyber Security Analyst to provide 24x7 monitoring and analysis for DoD networks above SECRET. The role is fully on-site in Arlington, VA with rotating shifts and onboarding over 4–6 weeks.

Candidates must have DoD clearance eligibility and strong reporting skills. The position requires deep knowledge of TCP/IP, security architectures, and incident response, with experience in SIEM tools and log analysis.

Qualifications

• Bachelor's degree and 4+ years of relevant experience or equivalent Cyber coursework/certifications.
• Active DoD Top Secret clearance eligibility required.
• Demonstrated understanding of TCP/IP, networking ports, protocols, traffic flow, OSI model, defense-in-depth, and security elements.

Responsibilities

• Review DoD and open-source intelligence for threats and identify Indicators of Compromise (IOCs).
• Utilize alerts from endpoints, IDS/IPS, netflow, and custom sensors to identify compromises.
• Review large log files, pivot between data sets, and correlate evidence for incidents.
• Triage alerts to identify malicious actors on networks.
• Report incidents to customers and USCYBERCOM.
• Develop, deploy, and maintain analytics and countermeasures.

Skills

Clearance eligibility

Communication skills

TCP/IP knowledge

Education

Bachelor's Degree

Tools

Splunk

Zeek

Suricata

SIEM

Job description

Description

Leidos has a current job opportunity for a Cyber Security Analyst on the DISA GSMO-II program in the Washington DC Area.

POSITION SUMMARY:

This position provides 24x7 cybersecurity monitoring and analysis services for Department of Defense networks above the SECRET level. This includes performing real-time cyber threat intelligence analysis, correlating actionable security events, performing network traffic analysis using raw packet data, and participating in the coordination of resources during the incident response process.

This position is fully on-site in Arlington, VA. Shifts include Days (morning), Swings (evening) and Mids (night), and may require weekend and/or holiday hours. Shift availability will vary based on program needs and staffing levels. All new hires' initial 4-6 weeks will be spent on weekday Day Shift to complete onboarding, training and familiarization. Applicants must remain flexible to potential shift modifications to assist in meeting minimum staffing requirements.

PRIMARY RESPONSIBILITIES:

• Review DoD and open-source intelligence for threats and to identify Indicators of Compromise (IOCs) and integrate those into sensors and SIEMs
• Utilize alerts from endpoints, IDS/IPS, netflow, and custom sensors to identify compromises on customer networks/endpoints
• Review massive log files, pivot between data sets, and correlate evidence for incident investigations
• Triage alerts to identify malicious actors on customer networks
• Report incidents to customers and USCYBERCOM
• Develop, deploy, and maintain custom analytics and countermeasures

BASIC QUALIFICATIONS:

• Must have an active DoD Top Secret security w/ SCI clearance eligibility.
• Bachelor's Degree and 4+ years of prior relevant experience; additional work experience or Cyber courses/certifications may be substituted in lieu of a degree.
• Demonstrated understanding of TCP/IP, common networking ports and protocols, traffic flow, system administration, OSI model, defense-in-depth and common security elements.
• Motivated self-starter with strong written and verbal communication skills, and the ability to create complex technical reports on analytic findings.
• DoD 8570 IAT level II or higher certification such as CompTIA Security+ CE, ISC2 SSCP, SANS GSEC prior to starting.
• DoD 8570 CSSP-A level Certification such as CEH, CySA+, GCIA or other certification is required within 180 days of hire.
• Demonstrated commitment to training, self-study and maintaining proficiency in the technical cyber security domain and an ability to think and work independently.
• Strong analytical and troubleshooting skills.
• Willing to perform shift work.
• Must be a US Citizen.

PREFERRED QUALIFICATIONS:

• CND experience (Protect, Detect, Respond and Sustain) within a Computer Incident Response organization.
• Demonstrated understanding of the life cycle of network threats, attacks, attack vectors and methods of exploitation with an understanding of intrusion set tactics, techniques and procedures (TTPs).
• Advanced understanding of TCP/IP, common networking ports and protocols, traffic flow, system administration, OSI model, defense-in-depth and common security elements.
• Experience with development and incorporation of AI and automation tools into Incident Response processes.
• Demonstrated hands-on experience analyzing high volumes of logs, network data (e.g. Splunk, Suricata, Zeek, Full Packet Capture), and other attack artifacts in support of incident investigations.
• In-depth knowledge of architecture, engineering, and operations of at least one enterprise SIEM platform (e.g. Splunk ES, Elastic).
• Experience and proficiency with any of the following: Splunk, Suricata, Zeek, Full Packet Capture, Network Forensics, Endpoint Detection and Response, Corelight, Elastic.
• Experience with malware analysis concepts and methods.
• Unix/Linux command line experience.
• Scripting and or programming experience to write Suricata and Zeek rule sets.
• Familiarity or experience in Intelligence Driven Defense and/or MitreATT&CK, and/or Cyber Kill Chain methodologies.

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: September 11, 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.

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.