Cyber Security Analyst

Leidos Inc; Shiloh (IL); On-site; USD 70,000 - 126,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave and Retirement

Competitive compensation

Job summary

Leidos is seeking a Cyber Security Analyst for a 24x7 front-line security operations role protecting high‑value mission environments. You will lead investigation and triage of security alerts, analyze complex datasets, and document TTPs for leadership.

You will leverage SIEM/SOAR platforms, integrate classified threat intelligence, and collaborate with incident response teams to ensure prompt, precise communication of incidents to mission partners.

Qualifications

• Active clearance requirements: DoD Top Secret
• DoD 8570 IAT Level II or higher certification (e.g., Security+ CE, SSCP, GSEC)
• CSSP-Analyst level cert within 180 days of hire

Responsibilities

• Investigate and triage security alerts from endpoints, IDS/IPS, NetFlow, and custom sensors.
• Perform deep-dive analysis of large classified logs and correlate evidence for incident investigations.
• Produce detailed findings and reports on adversary TTPs for stakeholders.
• Integrate classified threat intel feeds and IOCs into SIEM platforms and sensors.
• Collaborate with incident response teams and communicate security incidents to mission partners.

Skills

SOC Experience

Adversary mindset

Self-Motivation

Change management

Education

Bachelor's degree

DoD 8570 IAT Level II

CSSP-Analyst certification (e.g., CEH, CySA+, GCIA)

Tools

SIEM/SOAR

Job description

Description

We are seeking, proactive defenders for a critical role safeguarding the nation's most sensitive digital landscapes. As a Cyber Security Analyst on our 24x7 front-line security operations team, you will be directly responsible for defending mission environments against the world's sophisticated and persistent cyber threats. This role demands exceptional critical thinking, a deep-seated adversary mindset, and a self-motivated drive to excel in a high-stakes mission.

Primary Responsibilities

• Conduct investigation and triage of security alerts from endpoints, IDS/IPS, NetFlow, and custom sensors to identify and neutralize threats within our mission spaces.


• Perform deep-dive analysis of extensive, highly-classified log files, pivoting between disparate datasets and correlating evidence to support complex incident investigations against nation-state actors.


• Produce detailed technical findings and reports for high-level stakeholders, documenting adversary tactics, techniques, and procedures (TTPs).


• Integrate and operationalize highly-classified threat intelligence feeds and Indicators of Compromise (IOCs) into security sensors and SIEM platforms.


• Collaborate closely with specialized incident response teams and ensure timely, precise communication of security incidents to mission partners.

Key Skillsets We Are Looking For

• SOC Experience: You understand the operational flow, high tempo demands, and rigorous standards of a 24x7 Security Operations Center, particularly those operating at the highest classification levels.


• Critical Thinking & Adversary Mindset: You possess the ability to look beyond the surface of an alert to uncover the TTPs of advanced persistent threats (APTs). You excel at correlating disparate data points, analyzing raw packet data, and conducting deep-dive investigations of complex security events.


• Demonstrated Self-Motivation: You are a self-starter who takes active ownership of your professional development. Whether pursuing advanced certifications, researching emerging threat vectors, or mastering new tools, you drive your own growth to stay ahead of the adversary.


• Thrives on Change: The threat landscape and tactical priorities shift constantly. You demonstrate high operational adaptability, viewing unexpected shifts as opportunities to excel, and seamlessly pivot to adopt new processes, security tools, and analytical methodologies.

Shift & Operational Requirements

Predictable Work-Life Balance: To support your well-being, we utilize a predictable five-day, 8-hour shift structure.

Shift Options to Fit Your Lifestyle: Our 24x7 mission requires continuous coverage, but it also provides the opportunity to align your work hours with your personal routine. Key coverage windows include:

• Day Shift: 8:00 AM - 4:00 PM


• Swing Shift: 4:00 PM - 12:00 AM


• Mid Shift: 12:00 AM - 8:00 AM

Flexibility: We highly value your work-life balance and make every effort to honor your shift preferences whenever possible. While final assignments must ensure critical program requirements are met, we strive to manage scheduling with a balanced approach that respects our team members' personal needs alongside mission readiness.

Required Qualifications

• Clearance: Must have an active DoD Top Secret security clearance.


• Baseline Certification: Current DoD 8570 IAT Level II (or higher) certification, such as CompTIA Security+ CE, ISC2 SSCP, or SANS GSEC (or equivalent 8140 requirements).


• Specialized Certification: Ability to obtain a DoD 8570 CSSP-Analyst level certification (e.g., CEH, CySA+, GCIA, or equivalent) within 180 days of hire.


• Technical Core: Solid foundation in networking principles, including packet analysis, common ports/protocols, traffic flow, the OSI model, and defense-in-depth architecture.

Experience & Education:

• Bachelor's degree and 2+ years of relevant experience (Equivalent professional work or military experience will be considered in lieu of a degree)


• Location: Commutable distance (within 2 hours) or ability to self-relocate to Scott AFB, IL.

Preferred Qualifications

• Prior experience working within a TS/SCI operational environment, DISA, or other specialized DoD agencies.


• Experience applying intelligence-driven defense strategies utilizing the MITRE ATT&CK or Cyber Kill Chain frameworks against known APT intrusion sets.


• In-depth experience utilizing SIEM/SOAR platforms to perform behavioral and statistical analysis across multiple log types within a classified network.


• Knowledge or experience in defending classified cloud environments (e.g., AWS Secret/Top Secret, Azure Government Secret/Top Secret).


• Basic scripting and programming skills (e.g., Python, PowerShell) to automate routine analytical tasks.

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.

• competitive compensation


• Health and Wellness programs


• Income Protection


• Paid Leave and Retirement

Pay Range

Pay Range: Pay Range $69,550.00 - $125,725.00

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.

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.