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.