Senior Information System Security Officer (ISSO) - El Segundo, CA

RTX (Raytheon); El Segundo (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

RTX in El Segundo, CA seeks a Senior Information Systems Security Officer (ISSO) to ensure compliant cybersecurity practices onsite. You will liaise with the ISSM to align with NIST, DAAPM, JSIG, and NISPOM policies while supporting RMF-based assessments and security documentation.

Responsibilities include auditing, risk assessment, and implementing security controls, with expected certifications within six months of hire.

Qualifications

• Typically requires a University Degree or equivalent experience and minimum 5 years prior relevant experience, or an Advanced Degree in a related field and minimum 3 years' experience.
• Experience with RMF, JSIG, NISPOM and related security standards is expected.
• Experience with DoD/DOD-like classification environments is a plus.
• Ability to assess, audit, and document security controls and plans.

Responsibilities

• Assessing and monitoring system compliance and security plans.
• Investigating information system security violations and preparing reports with corrective actions.
• Reviewing and approving configuration management requests within authority.
• Conducting technical and administrative security assessments.
• Integrating new cybersecurity processes, procedures, and tools.
• Create, review, and update cybersecurity documentation and other technical writing.

Skills

Cybersecurity

RMF compliance

Auditing

Documentation

Communication

Education

Bachelor's degree in related field

Advanced degree in related field

Tools

Splunk

Forcepoint

Ivanti

Tenable

ACAS

HBSS

Job description

Date Posted: 2026-10-07

Country: United States of America

Location: US-CA-EL SEGUNDO-E07 ~ 2012 E El Segundo Blvd ~ BLDG E07

Position Role Type: Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type: Secret - Current

Security Clearance Status: Active and existing security clearance required on day 1

At RTX, the world largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today's mission and stay ahead of tomorrow's threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

Our cybersecurity team is seeking a Senior Information Systems Security Officer (ISSO) to support our team 100% onsite at our facility in El Segundo, California. The successful candidate will interface with the Information Systems Security Manager (ISSM) to ensure adherence with NIST Special Publications, customer directives, and company policies as applicable all NISPOM Chapter 8, DAAPM, JSIG policies.

What You Will Do

• Assessing and monitoring system compliance, auditing, security plan development and delivering information systems security education and awareness.
• Investigating information system security violations and help prepare reports specifying corrective and preventative actions.
• Reviewing and approving (within authority) configuration management requests.
• Conducting technical and administrative assessments.
• Integrating new cybersecurity processes, procedures, and tools.
• Support the creation, review and update of cybersecurity documentation and other technical writing.

Important note: Within six months of hire date, you must obtain and maintain a Security professional certification commensurate with IAM Level I certification (Security+ or other), if you do not already have this certification.

Qualifications You Must Have

• Typically requires a University Degree or equivalent experience and minimum 5 years prior relevant experience, or an Advanced Degree in a related field and minimum 3 years' experience.
• Relevant Experience Considered in any combination: Cybersecurity, systems security or hardening
• Information Technology
• Compliance-based auditing using the Risk Management Framework (RMF), DCSA Assessment and Authorization Process Manual (DAAPM), Joint SAP Implementation Guide (JSIG), National Industrial Security Program Operating Manual (NISPOM), and/or non-defense regulations such as FAA, Payment Card Industry (PCI), ISO 9001 Quality Management standards, or HIPPA
• Experience working with and/or supporting computer technologies (such as: databases, operating systems, computer network hardware, software programs, hardware troubleshooting or electronics)
• Physical security/security, policework/criminal justice, investigations, or Border Patrol
• Project or program management, office management, senior administration, or account management

Qualifications We Prefer

• Experience working in DoD classified operating and/or laboratory environments.
• Experience with various information system security tools that address vulnerability analysis and mitigation. These may include Splunk, Forcepoint, Ivanti, Tenable, ACAS, HBSS, etc.
• Familiarity with implementation of Government directives and policies derived from NIST, CNSSI, DoD, or other Government Regulatory compliance standards within a professional industry.
• Experience in the execution of the Assessment & Authorization processes, as defined within the Risk Managed Framework (RMF).
• Experience providing technical security consultation for complex, cross-domain, heterogeneous classified networked environments in collaboration with internal/external Customers, Information Technology (IT).
• Familiarity with large multi-facility networks including various complex components, including Windows and Linux environments.
• Experience interpreting, implementing, and assessing DISA STIGs.
• Familiarity with the execution and management of cyber incident response; preservation, containment, and eradication.

What We Offer

Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation.

Relocation Non-Eligible - Relocation assistance not av