Leidos is seeking a Cyber Security Analyst in San Antonio, TX. This position provides Tier II Cyber Security Analysis to C5ISR Center Defensive Cyber Solutions Branch (DCSB) Defensive Cyber Operations (DCO). Beyond advising and guiding technical matters, this position is tasked with driving implementation and adoption of new tools, research, capabilities, frameworks, and methodologies while ensuring those already in use are implemented, utilized properly, and improved.
Schedule: Day/Night Panama schedule- primarily hiring for night shift with the possibility to rotate to days
Primary Responsibilities
Identify and offer solutions to gaps in capabilities and visibility
Promote and drive research and implementation of automation and process efficiencies
Intermediate command line experience that includes chaining Linux utilities such as tcpdump, sed, awk, and grep together
Intermediate IDS (Snort, Bro/Zeek, etc.) creation and tuning, to include performing impact analysis on customer environments and review and correction of Tier I rules
Analysis of alerts plus surrounding network traffic to provide remediation context
Ability to consume open and closed source and search indicators in customer data, then generate new IDS configurations for future detection
Basic hunt experience that includes sifting non-alert-based traffic and deriving meaningful results in the absence of corresponding OSINT
Vulnerability awareness and able to determine applicability to customer environments, using data to establish attack attempts and success/failure
Maintaining current threat awareness
Ability to analyze complex (multipacket, multi-vector, multi-exploit, large volume) traffic and derive meaningful conclusions
Self-directed research, development, customization, or other contributions to process improvement
Continual enrichment of IDS and moderate ability to tune on the fly
Ability to self-educate with non-comprehensive or incomplete documentation on new concepts, protocols, and data formats
Basic Qualifications
Bachelor's Degree and 4-8 years of cyber or previous IT experience.
Hands-on cybersecurity network defense experience (Detect and Respond) within a Computer Incident Response organization. Hands-on experience with a Security Information and Event Management tool (ArcSight, Security Onion, etc.)
Fluent in computer network Packet Capture (PCAP) analysis
DoD 8570 IAT-II and CSSP-Analyst certifications required prior to starting
Demonstrated advanced knowledge of industry accepted standards.
Motivated self-starter with strong written and verbal communication skills, and the ability to create complex technical reports on analytic finding.
Strong analytical and troubleshooting skills.
Must be a US Citizen
Candidate must possess an active TS/SCI and be approved customer SAP read-ons
3+ years' experience working in a SOC environment
Preferred Qualifications
Deep technical understanding of core current cybersecurity technologies as well as emerging capabilities.
Demonstrated understanding of the life cycle of cybersecurity threats, attacks, attack vectors and methods of exploitation with an understanding of intrusion set tactics, techniques and procedures (TTPs).
Familiarity or experience in Intelligence Driven Defense, Cyber Kill Chain methodology, and MITRE ATT&CK framework.
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:
June 4, 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.