Information System Security Officer (TS/SCI & Expat to Guam Required) jobs in United States
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Lockheed Martin · 21 hours ago

Information System Security Officer (TS/SCI & Expat to Guam Required)

Lockheed Martin is a pioneer in cyber security, seeking an experienced Information System Security Officer (ISSO) to protect mission critical OCONUS information systems. The ISSO will ensure compliance with security policies, oversee security posture, and collaborate with various stakeholders to maintain cybersecurity standards.

AerospaceCyber SecurityMachinery ManufacturingMilitaryNational SecurityRemote SensingSecurity
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Growth Opportunities
badNo H1BnoteSecurity Clearance RequirednoteU.S. Citizen Onlynote

Responsibilities

Direct day to day security management for classified systems
Perform day-to-day information system security operations including auditing the IS and reviewing hardware and software baselines
Maintain and update System Security Plans (SSPs), Authorization Packages, and Continuous Monitoring Strategies
Conduct formal risk assessments, vulnerability analyses, and impact assessments; prioritize remediation actions and track mitigation status
Participate in internal/external security audits and inspections
Assist in the preparation of Authority to Operate (ATO) packages and support periodic re-authorizations
Partner with program managers, engineers, acquisition personnel, and internal/external auditors to embed security controls early in the design and development phases
Assist in conducting investigations of computer security violations and incidents, reporting as necessary
Facilitate internal and external audits, ensuring timely closure of findings and ongoing compliance with all applicable regulations
Ensure configuration management (CM) and IS security documentation is maintained
Assist the development and delivery of security awareness training

Qualification

NIST security controlsRisk assessmentsCybersecurity toolsSecurity Directives interpretationSAP / SCI environmentsTraining developmentEffective communicationCollaboration

Required

Candidate must expatriate full time to Guam for 6-12 months with possibility of extension
Selected candidate will be required to attend training in King of Prussia, PA upon onboarding
Experience working with and interpreting Security Directives, Policies, Publications and Regulations (e.g. ICD 503, JSIG, and/or DCSA Assessment and Authorization Guide (DAAG))
Experience using cybersecurity tools such as Nessus, Splunk, SCAP, HBSS, STIG Viewer to support compliance and monitoring activities
Previous experience supporting SAP / SCI environments as an ISSO / ISSE
Effective communication and an ability to work collaboratively as well as independently
Direct day to day security management for classified systems
Perform day-to-day information system security operations including auditing the IS and reviewing hardware and software baselines
Maintain and update System Security Plans (SSPs), Authorization Packages, and Continuous Monitoring Strategies
Conduct formal risk assessments, vulnerability analyses, and impact assessments; prioritize remediation actions and track mitigation status
Participate in internal/external security audits and inspections
Assist in the preparation of Authority to Operate (ATO) packages and support periodic re-authorizations
Partner with program managers, engineers, acquisition personnel, and internal/external auditors to embed security controls early in the design and development phases
Assist in conducting investigations of computer security violations and incidents, reporting as necessary
Facilitate internal and external audits, ensuring timely closure of findings and ongoing compliance with all applicable regulations
Ensure configuration management (CM) and IS security documentation is maintained
Assist the development and delivery of security awareness training

Company

Lockheed Martin

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Lockheed Martin is a global security and aerospace company that specializes in advanced technology systems, products, and services. It is a sub-organization of Lockheed Martin.

Funding

Current Stage
Public Company
Total Funding
$6.06B
Key Investors
Air Force Research Laboratory
2025-12-05Post Ipo Debt· $3B
2025-08-28Post Ipo Debt· $3B
2023-11-13Grant· $33.7M

Leadership Team

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Jim Taiclet
Chairman, President & CEO
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Craig Martell
Chief Technology Officer
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Company data provided by crunchbase