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Senior Specialist, Cyber Intelligence ISSO TSSCI with Poly

L3Harris


Job Location:

Palm Bay, FL - USA

Monthly Salary: Not provided by the employer
Posted: 6 August 2026 (30+ days ago)
Application Deadline: 7 December 2026
Vacancies: 1 Vacancy

Job Summary

Job Title: Senior Specialist Cyber Intelligence - ISSO

Job Code: 41901

Job Location: Palm Bay FL

Job Schedule: 9/80 Reg: Employees work 9 out of every 14 days totaling 80 hours worked and have every other Friday off

Job Description:

Join the frontline of cyber defense supporting classified government networks as an Information Systems Security Officer (ISSO). In this role you will help safeguard mission-critical systems by supporting Assessment & Authorization activities continuous monitoring system hardening configuration management and security compliance under RMF ICD 503 and NISPOM guidance. You will also investigate security incidents identify and remediate control gaps maintain a strong security posture across assigned systems and deliver security training that strengthens awareness and resilience across the organization. This role is a senior level ISSO who will provide mentorship and assistance to their more junior counterparts.

Essential Functions:

  • Maintain Assessment & Authorization (A&A) documentation of assigned systems
  • Perform security control assessments and execute Continuous Monitoring Plans
  • Work with IT and system administration organizations to develop device and system hardening guides following DISA and NIST guidelines
  • Responsible for the tracking and resolution of POA&Ms
  • Manage the incident response process for areas of responsibility
  • Develop new concepts standards and training material which make significant and impactful improvements to processes systems solutions or products
  • Lead inventory and asset management discovery and tracking activities
  • Work with site leadership to improve the security posture of systems and the facility
  • Mentor junior ISSOs in execution of tasks

Qualifications:

  • Bachelors Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related lieu of a degree minimum of 10 years of prior related experience.
  • Active Top Secret/SCI security with CI Polygraph

Preferred Additional Skills:

  • Active full scope polygraph
  • Willingness to submit to a full scope polygraph investigation (current polygraph preferred)
  • DoD 8140.03 certification
  • Minimum 8 years of prior relevant experience to include experience with networking equipment; experience interpreting vulnerability scanning results; experience reviewing workstation server firewall & IPS logs; experience with SIEM tools
  • Experience as an ISSO managing cybersecurity on classified systems under multiple agencies JSIG NISPOM Ch8 ICD 503 and/or NIST 800-53 implementations
  • Experience developing managing and providing evidence to close POA&Ms associated with the A&A and project management processes
  • Experience with workstation and server operating systems including but not limited to Microsoft and Linux offerings
  • Flexibility to adjust to changing requirements schedules and priorities
  • Able to socialize ideas make recommendations and gain team consensus
  • Excellent time management and task prioritization skills
  • Exceptional verbal written interpersonal and presentation skills customer relationship building skills analytical skills and ability to lead/mentor teammates.
  • High level of personal motivation and initiative to learn and acquire new skills

#LI-EK1


Required Experience:

Senior IC


About Company

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At L3Harris, we anticipate and mitigate risk with agile end-to-end solutions that meet our customers' mission-critical needs across all domains.

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