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Systems Security Analyst

Leidos San Antonio, TX

San Antonio, TX

Today

$70k - $126k/yr Full time Cyber Defense Information Security Information Technology (IT)

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Job Description

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 3DES.
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 (3DES)
Firewalls, demilitarized zones
Public Key Infrastructure (PKI)
TCP/IP, OSI model, Information Technology Infrastructure Library (ITIL)
DoD 8140, Defense Cyber Workforce Framework (DCWF), IAT Level II, Work Role 511 – Cyber Defense Analyst

Compensation and schedule

Location: San Antonio, TX (onsite)
Pay range: USD 69,550 to 125,725 per year

Benefits

Health and Wellness programs
Income Protection
Paid Leave
Retirement
Competitive compensation

Preferred qualifications

CSSP Infrastructure Support certification
Experience performing ISSO or ISSM functions
Experience with Cyber Network Defense and Analysis
Experience with IT security engineering
Experience with cloud-security engineering
Agile training or experience

Posting date: October 14, 2026

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