IT Security Engineer II

Leidos is seeking a Cybersecurity Specialist in support of NASA's National Security Systems team. This role is responsible for monitoring and analyzing the security posture of networks, servers, endpoints, and other systems. The ideal candidate will be instrumental in detection, mitigation, and response to cyber incidents using a combination of technology solutions and processes. This position requires the ability to work independently with general direction. Join us at AEGIS where the sky is NOT the limit! Primary Responsibilities

• Ensuring security issues are addressed quickly on discovery.
• Collecting and analyzing intelligence to correlate adversary tactics, techniques, and procedures.
• Investigating computer and information security incidents.
• Conducting computer forensic network and host analysis and intrusion and threat hunting support.
• Performing penetration tests to evaluate system security.
• Maintaining proficiency in operational tools, creating countermeasures, and identifying trends in adversary behaviors and vulnerabilities.
• Responsible for operational planning in support of training, exercises, operations and coordination of integrated cyber operations by targeting hostile adversary activities and capabilities.
• Applies advanced knowledge of concepts, processes, practices, and procedures on technical assignments.
• Other duties as assigned. Basic Qualifications Candidates should have command of the following skillsets:
• Expert knowledge in Splunk
• Experience with POA&Ms and vulnerability management
• Basic understanding of network infrastructure design, routed data protocols, and hardware platforms.
• Basic understanding of technologies such as DHCP, DNS, SSH, TCP, and UDP.
• Experience in WAN and LAN, routing, switching, and firewalls. (May want to change to Knowledge of. probably hard to find)
• Experience with security device architecture, engineering, and installation/management. (May want to change to Knowledge of. probably hard to find)
• Demonstrate basic knowledge of Cisco Firewalls.
• Knowledge in Operating Systems such as Windows, Cisco IOS, and RHEL. Preferred Qualifications Ideal candidates possess a deep understanding of the following areas:
• CISSP Education
• Bachelor with 4 years of experience 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:

May 21, 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 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 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 $17.2 billion for the fiscal year ended January 2, 2026. 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 here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to spam.leidos@leidos.com. Commitment and Diversity 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.