Vulnerability Analyst - Night Shift

Leidos LLC; San Antonio (TX); On-site; USD 70,000 - 126,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave and Retirement

Job summary

Leidos LLC in San Antonio, TX is seeking a Vulnerability Analyst for the 3rd shift (9PM-5AM) to join the CESO effort, building a secure, automated web services platform. This role is based on-site and requires a TS/SCI clearance to support sensitive government operations.

The position emphasizes vulnerability management, RMF compliance, and collaboration with infrastructure and application teams to reduce risk across the CESO environment.

Qualifications

• Bachelor's degree with 2+ years IT security experience.
• Active TS/SCI clearance required; DoDD 8140 compliant IAT II.
• Experience with DISA security model, controls, and authorization.
• Experience with Information Assurance Vulnerability Alerts (IAVA).

Responsibilities

• Meet regulatory and non-regulatory compliance demands across CESO environment.
• Assist in managing the IAVA program for CESO systems.
• Enforce information security policies and educate end-users on security practices.
• Conduct RMF, NIST-based risk assessments and testing to certify security controls.

Skills

IT security experience

TS/SCI clearance

IAT Level II

Security controls

Education

Bachelor's degree

Tools

ACAS

SEIM tools

Splunk

eMASS

Job description

We are currently seeking a Vulnerability Analyst 3rd shift (9PM-5AM) to join the Compartmented Enterprise Services Office (CESO) effort. This program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population.

Position is based in San Antonio, TX and is 100% on-site.

Requires a TS/SCI US Government Security Clearance to start.

Primary Responsibilities

• Responsible for meeting both regulatory (Legal and Mandated Requirements) and non-regulatory (Real-World Threat Reduction) compliance demands across the CESO environment.
• Assist in the management and maintenance of the IAVA (Information Assurance Vulnerability Alerts) program for CESO systems.
• Manage and enforce information security policies, and train and educate end-users on proper security practices.
• Conduct security and risk assessments using established frameworks (e.g., NIST, RMF, Common Criteria), mitigating risk via security controls and testing and evaluation to certify and accredit commercial security products used within the CESO platform.
• Develop, update, organize, maintain, and track RMF documentation using information obtained from the customer.
• Ensure privacy of data throughout its lifecycle; perform vulnerability management (scanning, assessment, reporting, and mitigation verification), business continuity, and disaster recovery activities.
• Coordinate with infrastructure, storage, database, and application teams to align vulnerability management activities with CESO's operational and compliance requirements.
• Maintain documentation, operational procedures, and compliance reports supporting CESO's secure cloud migration.
• Responsible for a combination of duties to protect information and maintain security controls across the CESO system, site, or program in order to reduce risk.

Basic Qualifications

• Bachelor's degree and 2+ years of related IT security experience; additional experience, education, or training may be considered in lieu of degree.
• Active TS/SCI security clearance required DoDD 8140 compliant certification, at minimum IAT Level II (e.g., Security+ CE), at start.
• Experience with the Defense Information Systems Agency (DISA) security model, controls, and authorization processes for standard computing systems and cloud computing across the Department of Defense.
• Experience conducting activities associated with Information Assurance Vulnerability Alerts (IAVA) for example, Cybersecurity and Infrastructure Security Agency (CISA).
• Experience with creating Information Assurance documentation such as Security Control Traceability Metrics (SCTM), Risk Assessment Report (RAR), Security Assessment Report (SAR) and maintaining POA&Ms (Plans of Action and Milestones).
• Experience with ACAS and SEIM tools.
• Experience with application and hardware security settings for vendor and/or DISA best business practices.
• Candidate may be asked to obtain a CI Polygraph in the future.

Preferred Qualifications

• Prior experience with DISA and DISA's support to mission partners.
• TS/SCI with CI Polygraph preferred.
• Experience with ACAS, SPLUNK, ACT (cybersecurity event), IAVA reporting, and eMASS.
• Familiarity with vulnerability management across enterprise applications and infrastructure (e.g., Oracle, SQL Server, Exchange, virtualization platforms, Windows, RedHat).
• Understanding of disaster recovery and business continuity concepts as they apply to secure cloud migrations.

Location: San Antonio, TX, 100% on-site.

Pay Range: $69,550.00 - $125,725.00

Pay and Benefits: Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

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 $17.2billion for the fiscal year ended January 2, 2026.

Original Posting: October 2, 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.

For more information, visit www.Leidos.com.

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 [e-mail].

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.