Senior Information System Security Officer

Leonardo DRS

Information System Security Officer ensuring compliance and secure operations. Collaborating on classified systems within defense and security sectors.

Posted 7/9/2026full-timeSan Diego • California • 🇺🇸 United StatesSenior💰 $83,527 - $119,480 per yearWebsite

Tech Stack

Tools & technologies

Firewalls

About the role

Key responsibilities & impact

Serve as the ISSO under ISSM direction, overseeing compliance and secure operations across the lifecycle of classified systems in alignment with DCSA and federal standards
Advise the Site Facility Security Officer (FSO) and ISSM on classified system security matters and liaise with the local DCSA ISSP
Ensure compliance with NISP, DoD, and DCSA requirements by executing local policies, processes, and procedures aligned with the DAAG
Execute RMF steps and maintain required documentation and artifacts, including policies, procedures, training materials, security control implementation, system diagrams, asset inventories, and POA&Ms
Maintain and renew ATOs for classified systems in alignment with DoD, DCSA, and company requirements
Collaborate with the DCSA ISSP and internal stakeholders to resolve assessment findings and strengthen security posture and compliance
Conduct periodic self-inspections and security assessments of classified systems and ensure timely corrective action
Support internal and external audits by updating documentation, validating configurations, preparing artifacts, and ensuring NIST controls remain compliant
Identify, document, and mitigate local threats and vulnerabilities to classified systems and ensure timely remediation
Support the ISSM in delivering site-wide security education and awareness for classified system users
Assist with investigations of security violations involving classified systems and ensure corrective actions are documented and implemented
Collaborate with program management, facilities, HR, IT, and other stakeholders to execute security deliverables and support personnel needs
Perform vulnerability scanning with approved tools (e.g., Nessus), analyze results, assess risk, and develop mitigations within required timelines
Ensure regular data backups, troubleshoot issues, and maintain the health and availability of virtual and physical storage systems
Install and configure patches, firmware, and software updates for servers and related hardware to maintain security, compliance, and performance
Serve as a designated Data Transfer Agent (DTA) to move authorized data across classification environments
Provide on-site technical support using multi-tiered troubleshooting to resolve moderately complex system and application issues
Monitor and enforce access controls for cleared systems supporting classified programs in accordance with least privilege
Administer end-user accounts through onboarding, role changes, and offboarding in compliance with authorization protocols
Conduct scheduled internal audits of system configurations, processes, and procedures to verify compliance, security posture, and readiness
Support additional tasks as directed by the ISSM, Senior System Administrator, ISSO, or FSO in support of mission, values, and security culture

Requirements

What you’ll need

Associate’s degree in computer science or certification (MSCE or GAIC) or equivalent related experience
3+ years of security experience in either the defense industry or Information Systems Security, or a combination of both
Completion of required Department of Defense (DoD) courses related to government security
Knowledge of information systems security components and best practices including; firewalls, intrusion detection systems, anti-virus software, data encryption, and other industry-standard techniques and practices
Knowledge of U.S. Government Information System security standards (i.e. NIST and ISO27)
Highly self-motivated and strong organizational skills and excellent attention to detail
Strong interpersonal oral, written and communication skills
Possess, or be eligible to obtain and maintain, a U.S. Government security clearance.
U.S. Citizenship required. This position requires an active DOD security clearance or the ability to obtain such clearance within a reasonable time after commencement of employment.

Benefits

Comp & perks

Health insurance (medical, dental, vision)
Employer matching 401(k) retirement plan
Paid time off including vacation, holidays, and sick leave
Parental leave benefits
Tuition reimbursement
Professional development support
Life and disability insurance coverage
Wellness programs focusing on physical, emotional, and financial well-being
Flexible work schedules with our 9/80 program

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Security AssessmentDocumentation ManagementPolicy ImplementationData EncryptionIntrusion Detection SystemsFirewall ManagementAnti-Virus SoftwareAsset Inventory ManagementSystem Configuration AuditsTechnical Support

Soft Skills

Strong Organizational SkillsExcellent Attention to DetailInterpersonal Communication Skills

Certifications

Associate’s Degree in Computer ScienceMSCE CertificationGAIC Certification