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Systems Security Analyst

Job in San Antonio, Bexar County, Texas, 78208, USA
Listing for: Cybersecurity Jobs
Full Time position
Listed on 2026-10-17
Job specializations:
  • IT/Tech
    Cybersecurity, Information Security & Data Protection, Network Security
Salary/Wage Range or Industry Benchmark: 70000 - 126000 USD Yearly USD 70000.00 126000.00 YEAR
Job Description & How to Apply Below

Leidos is seeking an Systems Security Analyst to support an Air Force Cybersecurity Service Provider (CSSP) mission. In this onsite role in San Antonio, TX
, you will evaluate and improve system security controls, security posture, documentation, and compliance, while collaborating with Government and technical stakeholders to drive actionable security recommendations.

Role focus
  • Assess the effectiveness of system security controls and apply security policies aligned to system security objectives.
  • Evaluate configuration management, change management, and release-management processes for security impact and compliance.
  • Support security requirements implementation and identify and mitigate security deficiencies through testing and ongoing assessment.
  • Analyze and report organizational cybersecurity-posture trends and system cybersecurity-posture trends.
  • Verify minimum security requirements are implemented for applications and systems.
Security analysis and implementation
  • Assess access controls using least privilege and need-to-know principles.
  • Evaluate cybersecurity-enabled products and compensating security controls to determine whether identified risk is reduced to an acceptable level.
  • Implement security measures to resolve vulnerabilities, mitigate risk, and recommend required security changes to systems or components.
  • Apply system security measures in accordance with established procedures to support confidentiality, integrity, availability, authentication, and non-repudiation requirements.
  • Mitigate or correct deficiencies found during security or certification testing, and recommend risk acceptance when appropriate for consideration by an authorized Government representative.
Testing, resilience, and documentation
  • Develop procedures and support testing for system failover and transfer of operations to alternate sites based on system availability requirements.
  • Plan and recommend system modifications or security adjustments based on exercise results or changes to the operating environment.
  • Ensure system security operations and maintenance activities are properly documented, updated as required, and maintained alongside implementation documentation.
  • Verify and update cybersecurity documentation so it accurately reflects application and system security-design features.
Collaboration and stakeholder recommendations
  • Provide cybersecurity recommendations to leadership based on significant threats and vulnerabilities.
  • Conduct research and analysis to support cybersecurity performance improvement and mission objectives.
  • Work independently and collaboratively with project, technical, cybersecurity, and Government stakeholders.
  • Perform other duties as assigned.
Required qualifications
  • Bachelor’s degree in Cybersecurity or a related field.
  • 3+ years of relevant cybersecurity experience.
  • Current Top Secret/SCI security clearance, with ability to obtain additional or higher read-ins as required.
  • Must meet DoD 8140 /
    Defense Cyber Workforce Framework (DCWF) Work Role 511 –
    Cyber Defense Analyst qualification requirements /
    IAT Level II certification.
Knowledge and skills
  • Encryption technologies and algorithms, including IPsec
    , AES
    , GRE
    , IKE
    , MD5
    , SHA
    , and 3

    DES

    .
  • Cybersecurity principles and organizational requirements for confidentiality, integrity, availability, authentication, and non-repudiation
    .
  • IT security principles and methods such as firewalls
    , demilitarized zones
    , and encryption.
  • Network access and identity and access-management concepts, including Public Key Infrastructure (PKI).
  • Operating systems knowledge; network traffic and communications concepts including TCP/IP
    , the OSI model
    , and ITIL concepts.
  • Understanding of system component installation, integration, and optimization, plus various computer architectures.
  • Network design processes covering security and operational objectives and associated tradeoffs.
  • Network-analysis tools used to identify vulnerabilities.
  • Ability to design integration of hardware and software solutions and assess how changes in conditions or environment affect system-security outcomes.
  • Skills in evaluating security designs and security-system access controls, including assessing security controls against cybersecurity principles and requirements.
Technologies
  • Internet Protocol Security (IPsec)
  • Advanced Encryption Standard (AES)
  • Generic Routing Encapsulation (GRE)
  • Internet Key Exchange (IKE)
  • Message Digest Algorithm (MD5)
  • Secure Hash Algorithm (SHA)
  • Triple Data Encryption Standard (3

    DES)
  • Firewalls, demilitarized zones
  • Public Key…
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