Senior Specialist, Cyber Intelligence (ISSO) (L4)

L3Harris Aeromet

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Description

L3Harris Aeromet is seeking an experienced Information System Security Officer (ISSO) to support classified systems operating in Special Access Program (SAP) environments. This role is responsible for maintaining the security posture and compliance of systems within SAP-accredited environments, supporting day-to-day cybersecurity operations, and helping sustain Authorization to Operate (ATO) status. The ideal candidate will have hands-on experience with classified systems, RMF implementation, vulnerability management, audit review, and system security documentation. This is a highly collaborative role supporting the ISSM, FSO, and broader security team in a mission-focused environment.

Essential Functions:

• Maintain and update the System Security Plan (SSP), system baselines, and related authorization documentation for assigned systems.
• Support ongoing compliance with RMF, JSIG, and CNSSI 1253 requirements.
• Perform audit reviews and monitor system activity for anomalies; elevate concerns to the ISSM as required.
• Apply DISA STIGs, conduct SCAP/ACAS scans, and track vulnerabilities through remediation and closure using POA&M’s.
• Manage classified media handling, including marking, accountability, sanitization, destruction, and Assured File Transfer (AFT) activities.
• Administer user accounts, privileged access, and permissions in accordance with need-to-know and least privilege principles.
• Support configuration management processes and assess the security impact of proposed system changes.
• Assist with continuous monitoring, annual self-assessments, and external inspections by the CSA/AO.
• Report incidents, spillages, and security violations immediately and support response, containment, and corrective actions.
• Provide user security awareness briefings and support SAP indoctrination/debriefing activities as needed.
• Assist with system interconnections, ISA/MOU documentation, and system decommissioning efforts.
• Ensures security requirements are addressed in acquisitions, procurements, and outsourcing efforts.
• Understanding of Windows/Linux System Administration and operations.
• Contributes to Risk Management Framework (RMF) activities and related system lifecycle documentation (e.g., CONOPS, SOPs, training materials).

Required Qualifications (active Secret or TS/SCI and one of the following):

• Must have active Secret Clearance and able to obtain Top Secret/SCI.
• Bachelor’s Degree and minimum 6 years of prior relevant experience.
• Graduate Degree and a minimum of 4 years of prior related experience.
• In lieu of a degree, minimum of 10 years of prior related experience.

Preferred Additional Skills:

• Active CompTIA Security+ CE or obtain 8410 Intermediate (formerly IAT Level II 8570).
• Previous experience as an ISSO/ISSM (or equivalent position) overseeing cybersecurity on classified and/or unclassified systems under ICD503, NISPOM, NIST 800-53, JSIG and/or DoDM/D.
• Familiar with vulnerability and configuration management tools (ACAS, Nessus, SCC, STIG, Trellix, and DLP).
• Experience in creating, conducting, or overseeing internal security assessments.
• Experience with Linux based operating systems.
• Familiarity with COMSEC and TEMPEST.
• Experience in SAPF/SCIF environments.

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L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

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